I'm Celine Roos WIM.
It was just luck that I found a page through Google
search for Books which linked to a French translation
of an 1805 report established by a Research Society on
Bengalese studies.
I guess the English original must be available
somewhere. If I had more time, I would propose a
translation into English but I'm terribly busy these
days, having left the world of chess for the world of
National Education in France.