== metch == 

 Did Tilman use "metch" or "metch-kangmi"? The article is unclear. I am unimpressed by David Snellgrove's 1955 claim the consonants "t-c-h" cannot be conjoined in the Tibetan language.  Is he talking about  the International Phonetic Alphabet? I hardly think Tilman intended t-c-h to be a sequence of the three consonants t then c then h. If OTOH t-c-h is a transcription, then the question is what scheme did Tilman use? Wylie transliteration and Tibetan pinyin had not yet been invented. But tɕ or tɕʰ or tsʰ are Tibetan consonants which an English speaker might well informally transcribe as "tch".