The collector of this carte-de-viste album, Kansas City dermatologist Gordon C. Sauer, M.D., spent much of his life researching the 19th-century ornithologist John Gould. This carte-de-visite album contains 97 photographs of 19th-century naturalists, the majority of which have been identified. Among the notable portraits in the album are those of John Gould and Charles Darwin.

Travel diaries of Mrs. Benjamin Eddy Cotting (nee Catherine Green Sawyer), who with her husband traveled to Brazil with Swiss-American biologist and geologist Louis Agassiz.