Correspondence, diaries, accounts, and manuscript articles and reports, pertaining chiefly to Brill's work in Wuchang, China, as head of the Hupeh Agricultural College and Experimental Farm and as a scientific explorer for the United States Department of Agriculture (1897-1901) and later in a similar capacity with the Department of Public Instruction on the Philippine Islands (1901-1902).

Correspondence of John L. Stone, Julia Stone Haviland and Paul Haviland; Lemuel Stone's Justice of the Peace records (Pennsylvania), 1829-1832; Julia Stone's scrapbook, Ithaca High School and Cornell University, 1906-1913; Paul Haviland's scrapbook, Cornell University, 1910-1914; photograph albums, ca. 1890-1930; family documents; genealogy for Stone and Parker families; and two loving cups presented to Professor Stone by his students, 1907 and 1913.