A recent discussion with Wei Yu Tan about his research on Kitan  
reconstruction, and what appear to be a surprising (to me) degree of  
Jurchen elements, has raised the question for me of how much work has  
been done on northern Manchurian languages before the 12th century  
Jurchens. Are there reconstructions or theoretical descriptions of  
Mohe?  Just wondering how old these influence might be in Kitan.