The Charles C. Pitt Collection consists of a series of journals resulting from weekly botany field trips, which referred to as "tramps," ranging in date from about 1898-1922. Pitt led these tramps through many areas around Baltimore, such as Loch Raven, Glen Burnie, Towson, Curtis Bay, and Ellicott City. The collection also includes biographical data, correspondence, photographs, and a book.

The Charles C. Plitt Collection consists of a series of journals resulting from weekly botany field trips, which Plitt referred to as "tramps", ranging in date from about 1898 to 1922. Plitt led these field trips through many areas around Baltimore, such as Loch Raven, Glen Burnie, Towson, Curtis Bay, and Ellicott City. The collection also includes biographical data, correspondence, photographs, and a book.

The Lyle Frederick Bellinger Collection of Gerow D. Brill Letters and Photographs contains materials received by Bellinger from 1897 to 1916 while Brill was posted to China by the U.S. Department of Agriculture (USDA). There are 10 letters including envelopes, three envelopes only, and one postcard. The collection also includes eight black and white photographs, four of which have been colored by hand. The photographs show scenes from China, including the Great Wall, as well as some cultural and agricultural practices of the people. There is also a portrait of Brill dated 1901. Brill was based at the confluence of the Yangtze and Han Rivers, near the cities of Wusan, Hangkow, and Hangyan, in order to establish a school of agriculture. While working in China, Brill traveled extensively. The letters document Brill's impressions of life in the Philippines, the Dutch East Indies, and parts of Europe.