Asa Gray correspondence. Senders F.

By: Farlow, W. G. (William Gilson), - Fenzl, Eduard, - Fernald, Merritt Lyndon, - Fielding, H. B. (Henry Barron), - Fischer, F. E. L. (Friedrich Ernst Ludwig), - Flower, William Henry, - Folsom, Susanna Sarah McKean, - Foster, M. (Michael), Sir,