Dear Jonathan,
I tried my Google-fu with a couple of internet searches in English and in Bengali, without success. I did find, though, this Google Books snippet, which makes certain that he was dead by 1992:
Unfortunately Google Books does not grant further access, but if it may be helpful I can check the copy in the library once I manage to get there (still largely off-campus chez nous).
If the annual memorial lecture in his name (still being held?) was instituted the year after his death, that may have taken place in 1991, at the remarkable but still possible age of 103. Indo-Iranica is the publication of the Iran Society in Kolkata, which is apparently still active.
Perhaps then (1889-ante 1992)?
namaskaromi,
Diego
Perhaps then (1889-ante 1992)?
namaskaromi,
Diego