Proto-Tibeto-Burman Grain Crops
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The Tibeto-Burman (TB) languages are spread over the entire Himalayan region, from Kashmir in the west, across northern South Asia, southwestern China and northern mainland Southeast Asia, in a wide variety of ecological zones from very high altitude to tropical. They include over 200 languages falling into four major subgroups (Western, Central, Sal, Eastern), with various additional smaller subgroups (Bradley 2002). Much ink has been spilled in the linguistic literature about the original homeland of the early Tibeto-Burman groups, but it is clear that this must have been somewhere south and west of the early Chinese civilization in the upper Yellow River valley. One frequent hypothesis is that the area of greatest genetic linguistic diversity within a language group is the point of origin; on this criterion, this would be in the mountains of northeastern India, southeastern Tibet and northern Burma, where the four major subgroups meet and there are some additional smaller subgroups as well. If this is so, we would expect highland grain crops indigenous to this area to have been the staple, if agriculture was present before the breakup of Proto-TB or Proto-Sino-Tibetan (ST).
The TB languages with the longest literary history include Tibetan (7th C. AD), Burmese and Newari (both early 12th C. AD). Tibetan tradition lists six main crops including five grains plus beans. Burmese tradition has seven main grain crops. Sagart (1999) has hypothesized that the Sinitic groups had five major crops: three grains, Setaria italica millet, Panicum miliaceum millet and rice, plus beans, and later wheat, introduced about 4000 years BP. The location and date of rice domestication(s) is contested, as other speakers will certainly discuss.
Even for grains first domesticated elsewhere, it is not unreasonable for there to have been Proto-TB etyma (cognate words) if they were introduced early enough. This paper will explore some of the etyma that we would expect to find among TB groups for the grain crops domesticated in the area, including rice, millets including Setaria, Panicum and Eleusine coracana as well as buckwheat, Job’s tears and older introduced crops such as sorghum, wheat and barley.
Five Chinese crops
Six Tibetan crops
‘millet’ (all varieties)
Tibetan agriculture has adapted itself to an extreme high altitude environment, in much of which rice cannot be grown; on the other hand, Tibetans grow a highland barley variety and other highland crops such as buckwheat which are not staples among Chinese groups.
Seven Burmese grain crops
The Burmans arrived in the hot plains of upper Burma in approximately 832 AD (Luce 1985:101–103) and would have adopted some lowland crops while abandoning upland crops not suitable for the new environment. Thus, unlike all closely related TB languages, Burmese has no cognate for ‘buckwheat’ but rather uses a Jinghpaw loan. Burmese also uses an Indic loan Open image in new window for ‘wheat’ and possibly another for ‘barley’.
The word for the first of the seven grains is said to be a loan from Pali sāli (Myanmar Language Commission 1993:491), which may imply that the Burmans were unfamiliar with indica rice until they encountered it in cultivation in the irrigation system they inherited from the TB groups of Upper Burma after 832 AD. The ‘barley’ term may also be borrowed from an Indic model, yáva. Five other grain terms are cognate with words in the most closely-related TB languages, as we will see in Table 5 below. The general word for ‘grain’ in Burmese, especially the rice varieties, is Open image in new window , which is a Mon (Austroasiatic) loanword.
Newari grain crops
As can be seen, ‘barley’ and ‘buckwheat’ are compounds containing the chwa ‘wheat’ etymon, and one millet type is an Indic Nepali loan. The identification of satiwā as ‘sorghum’ is not certain; some sources give this for Panicum crus-galli instead or as well. According to Newar history, dusi millet was an important early crop alongside rice.
In general, there is a lot of semantic shifting among etyma for grains: general terms for unhusked, husked and cooked grains may shift their main grain referent when the main grain crop changes, as from millet to rice among the early Sinitic groups. As we will see, basic grain terms may also shift referents from one grain to another. Thus, care is needed in reconstructing the original referent of any term.
Rice (Oryza sativa varieties)
This grain is found in the Chinese, Tibetan and Burmese lists of basic grains and in Newari, even though it is not widely grown in upland Tibet. The Tibetan word for rice looks very similar to the Austronesian root *bəras, though direct contact is highly unlikely. The oldest Burmese form appears to be related to the Chinese form 穀 gǔ Karlgren 1226i ‘grain’, Baxter (2011) *[k]‘ok. Of course it has also been suggested that this etymon may have an Austroasiatic origin, particularly by those who posit an Austroasiatic origin of indica rice cultivation in mainland Southeast or northeastern South Asia.
Sagart (1999) has suggested that Panicum miliaceum and Setaria italica cultivation was the basis of early Chinese agriculture in the upper Yellow River valley, before rice and later wheat. Some sources suggest domestication by as early as 7K BP in the likely Sinitic homeland. Both millets also appear in the list of basic Burmese grains, but are somewhat confused in Tibetan and Newari. Many western sources also confuse the Setaria and Panicum millets. Eleusine coracana is also widely cultivated by TB groups in South Asia. As millet cultivation has greatly decreased with higher-yielding replacement crops, these terms may also be confounded or lost.
Buckwheat (Fagopyrum species)
Fagopyrum esculentum or sweet buckwheat and Fagopyrum tataricum or bitter buckwheat are widely grown in upland areas where TB languages are spoken, and may have first been domesticated there. It is in the Tibetan basic list and widespread in Burmic languages other than Burmese. There are cognate forms within parts of TB as we will see, but the Chinese term 荞 qiáo is only attested for less than two millennia (Sagart p.c.) and may be a loan from some Eastern TB language. Pulleyblank (1991:252) reconstructs *giaw for early 7th century AD Chinese, this is suspiciously similar to Eastern TB forms as we will see.
Job’s tears (Coix lacryma-jobi)
Two varieties of this crop are grown as a food grain and for use as beads; in some languages, there are separate words for the grain in these two uses. It appears to be an early crop, possibly first domesticated in the TB-speaking area, and there is some similarity between the Chinese form 薏苡 yìyǐ (Baxter 2011 Open image in new window ) and the early Burmese form k-lit. However, this Chinese form is only attested from the Qin Dynasty (2.2K years BP), and may, like the buckwheat term, be a loan from some Eastern TB language.
Sorghum (Sorghum vulgare)
It is said that sorghum was first domesticated in Africa; the date of its introduction to this area is unclear, but the absence of an ST root and of a TB root means that it is fairly late. The Chinese term 高粱 gāoliang ‘high grain’ is obviously a compound, and this form is very frequently borrowed into a wide range of TB languages in the Sinosphere.
Wheat (Triticum aestivum), barley (Hordeum vulgare, including a highland variety) and oats (Avena sativa)
These three crops are clearly introduced, and some are less suitable for the probable highland habitat of the early TB speakers. Nevertheless, wheat and barley have become key crops for some TB groups. Given that the Chinese form 麥 mài appears to be a loan from Indo-European, possibly via Turkic, there can be no ST etymon; even within TB, there are various forms, as discussed in 3.2.6 below.
Maize (Zea mays)
Obviously this new world crop can only have been introduced less than 500 years ago, so it is impossible for there to be a TB etymon, other than by semantic shift of an existing etymon or due to borrowing of an outside word which came with the crop. Most words for maize in TB languages and in Sinitic are compounds of existing words, such as Chinese 玉米 yùmǐ ‘jade rice’ and 包穀 bāogǔ ‘wrapped grain’, Burmese Open image in new window /pyaun42 bu42/ ‘sorghum-gourd’, Black Lahu Open image in new window ‘wheat-big’, Yellow Lahu Open image in new window Lisu Open image in new window both ‘rice-wheat’. If similar words are found across languages, this implies that the languages separated less than 500 years ago (as in the case of the syllable /du33/ in Hani ceildu/tshe55 du33/‘paddy-maize’ and Akha a v du Open image in new window ‘maize’, Bradley 1997), or had contact less than 500 years ago, even though they are not now in contact (as in the case of Yellow Lahu and Lisu); conversely, the difference between Black Lahu and Yellow Lahu may imply that these two languages separated more than 500 years ago, before the introduction of maize in the area.
Other evidence for early agriculture includes cognate terms for agricultural activities such as planting, terms for stages of grain production such as unhusked grain/husked grain/cooked grain, terms for agricultural implements such as dibbling sticks, and terms for foods made from grains. Again, one must be cautious, as some such words would doubtless have existed in hunter-gatherer societies, such as tools and activities associated with gathering, processing and eating wild grains, and some words may have shifted their referents. However, that is the topic of another paper.
The best candidates for early TB agriculture are the millets Setaria and Panicum, which were also the basic grains in the earliest Chinese agriculture. Rice was also early, but perhaps not quite early enough. There are various etyma for other grain crops which are found in certain subgroups of TB, but not across all; such shared forms may allow us to date either the last contact or the earliest split date within the subgroups thus defined.
Proto-Burmic grain crop Etyma
The Burmic languages are one of the major components of the Eastern TB group. Burmese represents the Burmish subgroup, while Lisu, Sani and Lahu represent subparts of the Central Ngwi (Loloish, Yi Branch, Yipho) subgroup, Nosu represents Northern Ngwi and Akha represents Southern Ngwi. Since we know that the time depth of divergence among these Burmic languages is probably less than two millennia, this illustrates how substantially the system of an individual language can change. Using the reconstruction schema of Bradley (1979), we reconstruct the forms seen in the rightmost column.
Apart from various forms lost or replaced by loanwords, here we see some semantic shifts, such as the Lahu form ‘wheat’ generalized from the ‘barley’ etymon, the Akha form ‘barley’ from the Panicum etymon, the Akha ‘edible Job’s tears’ from the Setaria etymon, and the Lahu form ‘Job’s tears’ from the ‘cowrie’ etymon; the hard-grained variety of this last crop is widely used for beads, as are cowrie shells. We also see the replaced Lahu cognate for ‘wheat’ as the first syllable of ‘maize’, as well as the first syllable of Akha compound forms for Setaria and ‘sorghum’, and the etymon for ‘rice grain’ preserved as the first syllable of Lisu ‘maize’, where the second syllable is the ‘wheat’ etymon. Note also the innovative Burmese words for ‘barley’ and ‘cooked rice’, and the variety of terms and combinations even for a relatively widespread and old crop such as ‘Job’s tears’; the *g-lit H etymon is seen in Burmese, the first syllable in Sani and the first syllable in Akha ‘inedible Job’s tears’; the *ku 1 etymon is seen in second syllables in Lisu and Sani; and the *laŋ 1 etymon is seen as a first syllable in Lisu and Akha, but in forms with different meanings. Thus the semantics of some etyma is less than certain, and more comparison with forms in related languages is required.
Bodish grain crops
Within Tibetan itself, Balti is the westernmost variety, spoken in northern Kashmir since 737 AD and isolated since conversion to Islam in 783 AD. Ladakhi and Dzongkha are spoken in separate political entities in northeastern Kashmir and in Bhutan, but maintain contact with standard literary Tibetan. Chantyal is included as a typical West Bodish language of Nepal; Kurtöp is included as a typical Bumthang/East Bodish language of Bhutan. As can be seen, West Bodish grain crop terminology is mainly distinct; East Bodish is much closer to Tibetan but replaces one of the ‘millet’ etyma with the Tibetan ‘bean’ etymon. It is of course likely that with direct contact between Tibetan and other Bodish languages, some Tibetan words may have been borrowed in place of the regular cognates. If the data is accurate, many Bodish languages have merged the ‘millet’ etyma, eliminating one or the other. There are clear and widespread forms for ‘wheat’, ‘barley’, ‘buckwheat’ and ‘rice’, and two sporadically-maintained etyma for types of millet. Other than the Panicum form of Tibetan and the generalized millet form of Ladakhi, none of these is similar to the Burmic etyma discussed above. Various loanword sources have been proposed for the Tibetan ‘rice’ term.
ST and TB grains
In Bradley (1997) I speculated that there is a relationship between the Burmic Setaria and Sinitic Panicum forms, and there are Tibetan and Newari candidates for cognacy as well. One could also speculate that the Sinitic ‘rice’ form, the Burmese Panicum form and the first syllable of the Newari Setaria form are related, with various semantic shifts and affixes. Matisoff (2003:163) proposed a Ngwi (Loloish) etymon *g-ra for ‘buckwheat’, which might tempt one to reconstruct a TB etymon linking the Tibetan, Burmic and Newari forms, but this is based on an incorrect initial reconstruction for Ngwi; the resemblance is mainly in the rhyme, which is not enough. We have also seen that there is a likely link between the Sinitic ‘grain’ and the Burmic ‘japonica rice’ terms, perhaps with a general meaning ‘grain’.
Looking beyond Burmic, Bodish and Newari to see how grain crop terms are distributed within the major branches of TB, we find interesting patterns which tend to support the classification of TB proposed in Bradley (2002), but which also raise many questions requiring further research.
Firstly, it should be said that terms for grains at different stages of use (seed/unhusked grain, plant, husked grain, cooked grain) can readily shift referents from one grain to another, so it is unwise to attribute them uniquely to one grain. Secondly, in most modern TB societies rice is the principal grain, and so the semantic shift if any is likely to have been toward rice-related referents. Thirdly, if it is correct that rice was not first domesticated by speakers of Proto-ST or Proto-TB, one would not expect to find a universal reconstructable term. Finally, such words are subject to sociolinguistic change, whereby culturally-important words may have a series of honorific replacements through time, and there may be informal and baby-talk alternatives as well.
If we take the Burmic terms in Table 5 above as a starting point, unhusked japonica paddy was Open image in new window , husked rice was *čan 1 , and cooked rice was more variable, *dza 1 , *haŋ 2 or *maŋ 2 . We can probably dismiss *haŋ 2 , as in Burmese the cognate Open image in new window haŋ 42 /hĩ42/ actually refers not to cooked rice but rather to cooked dishes eaten with rice; the Ngwi cognates are restricted to Southern and some Central Ngwi languages in any case. However, there is also a possible Na (transitional between Qiangic and Burmic) cognate form seen in Shixing Open image in new window and Naxi Open image in new window and meaning ‘cooked rice’. The *maŋ 2 form is clearly secondary; it is seen with a prefixed syllable in Burmese Open image in new window t h amaŋ42/thəmĩ42/ and also in Gong /maŋ33/, but not elsewhere. It is likely that the *dza 1 etymon is a doublet form of the near-universal Proto-TB verb form *dza ‘eat’, though the latter comes out with a different tone in Burmic: *dza 2 . This leaves us with no candidate term for cooked rice to trace further back from Eastern TB toward Proto-TB.
Cognates of the Open image in new window ‘grain’ term are fairly widespread, not just in Burmese but also in many other Burmish and other TB languages as well as in Sinitic. If this term has the Austroasiatic origin sometimes proposed (Diffloth 2005:78 Open image in new window ‘rice’ for example), it must be an extremely early loan. Its distribution within ST is not restricted to Sinitic and Eastern TB, which would have been closest to the early Austroasiatic area; in addition to Qiangic languages such as Tangut/Xixia, Qiang, Guiqiong, Zhaba, Daofu, Luzu and rGyalrung, possible cognates are also found in Bai, Digarish and Mijuish Mishmi and in Tshangla. This puts it also in parts of Central and Western TB, though not in the Sal branch. One might relate various Western TB ‘cooked rice’ forms such as West Bodish forms reflecting *kan and Bantawa (Kiranti) kok in addition to the apparent East Bodic Tshangla cognate.
The *čan 1 etymon is found throughout Burmic, also in a nasal-prefixed form in Na languages and in many Qiangic languages. One also finds similar forms with a final velar nasal in some Kuki-Chin languages, from Ao in the north to Mkaang, Thadou and Meithei in the south.
We may also consider the widely-proposed Proto-TB ‘cooked rice’ etymon *mai or *ma, seen in Sal languages such as Bodo-Garo and Karenic *mai, also *ma in Tani languages, Bai me, Karenic *me 3 and metathesised forms such as Nungish *am, Sak (Luish) aŋ and so on; we also find forms reflecting *mama as a baby talk alternative in a number of Ngwi languages and in Qiang, as well as the general Jinghpaw term mam for ‘grain’. There may be a connection here with the Sinitic 米 Open image in new window etymon ‘(rice) grain’, and a Tani *mi etymon with the meaning ‘millet’ there, noting the semantic shifts and the rhyme problem.
As we have seen, Burmic has two solid millet etyma, Setaria millet *tsap and Panicum millet *lu 2 . The former is near-universal among Burmish and Ngwi languages, the latter is less widely attested. As is often the case for Burmic etyma, we find likely cognates for *tsap in a variety of Na and Qiangic languages, including Shixing, Guqiong and Qiang, and in Nungish languages such as Dulong, Anong and Rawang, so this is clearly an Eastern TB etymon. It is tempting to relate this to Tibetan tse, Newari dusi and further to Sinitic (Baxter/Sagart 2011) *tsa[t]s with a semantic shift. Blench (2009) proposes a Proto-ST Setaria etymon *tsɔk based on a different Chinese form (GSR 0337c in Table 1 above).
The Panicum millet etymon *lu is less widespread outside Eastern TB, but in Western TB we find forms like lis, lik or rik in some Kiranti languages (Dumi, Hayu, Thulung, Limbu) and Open image in new window in Chepang. This may also be where the Tibetan forms derived from khre fit, along with West Bodish forms such as Gurung Open image in new window and the second syllable of Thakali raŋre. More commonly encountered are forms reflecting *si seen in various Sal languages including Northern Naga (Konyak, Phom) and Bodo-Garo *maisi. In Western TB, some possible cognates are seen in Kiranti languages such as Thulung sər, not to mention the second syllable of Newari dusi; also in Bai se 21 , Tangut/Xixia so, and in Karen languages such as Kayan swì. Possible cognates related to *si are thus represented in Western, Sal and various smaller subgroups of TB, but not in Central or core Eastern TB. Some Central TB languages support a form *yaŋ as seen in Digarish Mishmi, Mijuish Mishmi and Tshangla; this is possibly related to Tani *yak, Chin *θaaŋ, Jinghpaw ya and the first syllable of Thakali raŋre. Tangkhul has hanshi and rəŋ, the former reflecting *si and the latter perhaps indicating a link between *yaŋ and *lu. Note also the Sinitic ‘rice’ form and the first syllable of the Newari Setaria form as possible cognates.
In general, much more work is needed to distinguish types of millet in many TB languages. Additional internal reconstruction within branches of TB other than Burmic is also necessary before making further advances in reconstructing back to the Proto-TB stage.
The Burmic reconstructed ‘buckwheat’ etymon *ŋga 2 is fairly widespread in Eastern TB languages. This includes forms in Qiangic languages such as Tangut/Xixia, Guiqiong and Ersu, in the Na languages such as Naxi, in Bai and so on. Forms connected with Tibetan bra are also fairly widespread in a variety of Western TB languages, with an alternative form *bra-ma in Kiranti and in East Bodish. Forms similar to bra are also seen in some Central TB languages such as the Tani group, Mijuish Mishmi, Digarish Mishmi and in some northern Qiangic languages such as Qiang, Daofu and Ergong which are in contact with Tibetan. We can also discern evidence for possibly related forms like *pawa in Nungish (Rawang, Dulong, Anong) and *s-ra in Sal languages such as Jinghpaw and some Qiangic languages. In addition to the two main competing TB etyma, there is also evidence for *šok in rGyalrung, *kyok in some non-Burmese Burmish languages and so on. More work within various subgroups of TB is required to solidify these very tentative etyma. One should not be misled by the frequent inclusion of the near-universal Proto-TB etymon *ka ‘bitter’ in many compounds for buckwheat, especially Fagopyrum tataricum which may have been the earlier cultivar in this area.
Relatively few sources contain this word at all, so the Burmic reconstructions *g-lit H , *ku 1 and *laŋ 1 can hardly be documented elsewhere, other than the possible loan in Chinese noted above. Post (2011) suggests a Tani group etymon Open image in new window , but cognates are not found outside this group. There appears also to be a Karenic etymon with an initial voiced bilabial stop. It is likely that with better information, a clearer picture would emerge.
As we have seen, Burmic suggests a reconstructed form *p-loŋ 2 for this etymon, but it is hardly represented in TB outside Burmish and Ngwi. We might compare the prefix to the etymon *bri found in Kiranti and parts of Northern Qiangic. Thus this crop must be relatively recent, and no TB etymon is reconstructable.
Wheat and barley
There are three main ‘wheat’ etyma suggested from TB data, including the Burmic *ša 3 form, forms related to the Tibetan gro form, and some Western and Sal forms suggesting *gom/goŋ: *gom in Bodo-Garo, *g-hoŋ in Chepang, Baram and Luish. The most widespread is the *ša 3 form, seen in many Qiangic languages (Ersu, Luzu, Pumi, Zhaba etc.), in Namuyi, in Nungish and throughout Ngwi and Burmish. Thus, this appears to be an Eastern TB etymon with diffusion into Nungish.
The Burmic ‘barley’ etymon *zu 3 is widely represented in some Qiangic languages (Ersu, Luzu, Pumi, Choyo, Daofu, Ergong, rGyalrung, etc.) with a voiceless initial, and in others (Muya, Qiang) with a voiced initial. In Na languages (Shixing, Na, Naxi) and in Bai, forms have a voiced initial, and in Nungish languages it varies. Cognates are widespread in Northern and Central Ngwi but less so in Southern Ngwi. The Burmese form may be a loan from an Indic source, yáva. As in the case of *ša 3 ‘wheat’, the *zu 3 ‘barley’ etymon appears to be restricted to Eastern TB. The Tibetan nas form is restricted to Bodic, including East Bodic Tshangla, and is occasionally borrowed into other TB languages.
Grain-growing agriculture was the basis of early Sinitic and every large early TB society; however, the actual words for these grain crops do not show clear and regular cognates across the full range of ST and TB languages. The best hypothesis appears to be that gathering and then cultivation of two millets *luPanicum and *tsapSetaria was very early, but with full etymological evidence obscured by semantic shifts as Sinitic and TB groups acquired alternative grain crops and moved into new ecological zones. Rice was later but also early, however the etymological evidence for the cognacy of rice-related lexicon in some branches of TB is less clear; the etymon Open image in new window may have been used for grain in general and later for rice in some languages, and the etymon *mai may have originally been used for cooked grain, later shifting to cooked rice in some TB languages. Van Driem (2009, 2011) suggests that the first domesticators of rice were speakers of Hmong-Mien languages in southeastern China. Other locally-domesticated crops such as buckwheat and Job’s tears appear to have developed much later, possibly spreading from the Eastern TB area into Sinitic. Introduced crops, some of them quite early such as wheat and barley, have also played an important role, and etyma for the earliest of these can be reconstructed back to various intermediate stages, especially for Eastern TB where available data is most detailed, but not to Proto-TB. Even more recently-introduced crops like maize or others such as chillies, tomato, eggplant and potato can be revealing about recent contact and split phenomena. Genetic and contact linguistic relationships of more recent date can be traced through the distribution of words for these secondary crops as well as some primary crops in some languages.
The comparative method in linguistics has been developed over the last two centuries. It was initially applied to Indo-European languages and subsequently to many other language families. It involves identifying and comparing basic vocabulary to determine regular patterns of sound similarity and thus identifying cognates (historically related words). These similarities are not necessarily identity. For example, when comparing the number ‘2’ in various Indo-European languages, we find initial t in English, z (pronounced [ts]) in German, d in Latin, Greek, Sanskrit and so on; such patterns are repeated in many cognates; see for example ‘10’, ‘tooth’ and so on.
The comparative method allows for reasonable change in the meaning of cognates in some languages; it also facilitates the identification of contact vocabulary (loanwords) which do not follow the regular patterns of sound similarity, but rather reflect the word as it enters from another language; for example, all the English words with meanings related to ‘2’ which contain borrowed duo- with initial d.
In applying the comparative method, we may find some false negative results, cases in which the cognate word has disappeared from some or most related languages. If loanwords are not properly identified, there may also initially be some false positive results, similar words which have been borrowed.
The cognate words and their meanings allow the reconstruction of a great deal of information about the earlier culture of the speakers of the languages within the family; so, for example, if all words for ‘rice’ are cognate across a family and the word is not borrowed, we can infer that the ancestral group had rice or some similar plant.
Even the borrowed words are interesting in several ways; firstly, they show the direction of cultural diffusion, for example the word for ‘wheat’ in Chinese as discussed above. They also reflect changes within the borrowing language after the borrowing. To give an English example again, the Latin plural ending –i in words such as alumni is now normally pronounced with the sound [ai] according to a sound change which took place in English around 1600 AD. This means that we can approximately date both the time of borrowing and the various sound changes within a language prior to and after the borrowing.
While all work within the comparative method is necessarily hypothetical, in a large language family like Sino-Tibetan or its component parts Sinitic and Tibeto-Burman we can discover a great deal about earlier stages of human society through its use. This includes its agricultural practices and crops.
I am very pleased to acknowledge data and suggestions from William A. Baxter, Franklin Southworth, Gwen Hyslop, Ken Manson, Mark Post, Laurent Sagart, Karma Tshering and various participants in the Cornell symposium; of course they are not responsible for any conclusions I have drawn. Data not otherwise attributed is from my field notes and/or the STEDT database.
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