William Jacob Holland

William Jacob Holland, an American naturalist and administrator, was born Aug. 16, 1848. Holland’s scientific interest lay in butterflies, and he published an attractive book on the butterflies of North America in 1898 (which we have in the Library), but about...

Gerhard Heilmann

Gerhard Heilmann, a Danish artist and amateur student of fossil birds, was born June 25, 1859. Heilmann earned his living as a graphic artist, but he was interested in birds,  bird anatomy, and especially bird origins, and he read about the prevailing idea, first...

Richard Swann Lull

Richard Swann Lull, an American paleontologist, was born Nov. 6, 1867. Swann became interested in dinosaurs when he studied in Amherst, Mass., where Edward Hitchcock had assembled an impressive collection of Triassic dinosaur trackways. So when he was offered the...

Joseph Leidy

Joseph Leidy, an American physician and naturalist, was born Sep. 9, 1823. Leidy was a prominent member of the Academy of Natural Sciences in Philadelphia, and he was the first to recognize dinosaur remains in North America. In 1856, Leidy identified some teeth that...