Espy's index cards

Examples found below. But each card was identified by searching the M. Watt Espy Papers housed at the M.E. Grenander Library. Then, the data were verified, coded, and additional sources from the cards located and verified. Then, any resources beyond what is provided in the Espy Papers were consulted, compared, and noted in a separate dataset (available upon request). For full card information (and proper citation) please follow the embedded link and search on name and date.