Herman Silas Pepoon (1860-1941) was a physician, teacher, botanist, and naturalist with a particular focus on the plants of Illinois and the Midwest. Pepoon was an active and well-known presence in Illinois’ scientific community, and a life member of the Chicago Academy of Sciences, which named him Honorary Curator of Botany for the institution in 1930. The Academy published Pepoon's best known work, the book An Annotated Flora of the Chicago Area, in 1927. Today, the Academy houses specimens and archive materials from Pepoon, including personal papers, correspondence, authored books and articles, field notes, scrapbooks, clippings, and photographic images. This image is a scan from one of Pepoon's field notebooks, written in 1917-1918.