BUTTERFLY COLLECTORS of yesteryear

[Tuffsearch]

Hi all,

Would anyone know how I would find out about a collection of butterflies my
 Great Uncle once donated to, I believe, the Museum of Natural History in
 Manhattan.  I would like to find out if the collection still exists, or where
 it is stored (once displayed) and what, if any, documentation is kept on the
 collector/donator (George Schmidt).

Any suggestions are greatly appreciated, thanks in advance for your advice.

Patty