Correspondence relating to the collection, classification, and study of plant specimens; recommendations for graduate students; notes on the development of botanical investigation at Cornell; and diary of a trip to Europe. Material relating to Atkinson's work at the University of North Carolina and the Agricultural Experiment Station in Auburn, Alabama.

Correspondence and notes relating to the collection, identification, and nomenclature of plant specimens and the preparation of articles for the International Botanical Congress and the Mycological Society of America. Also, "Lectures on Mycology: Basidiomycetes" for Plant Pathology 221 and 222, revised 1941. Also, "An historical sketch of the early days of botany at Cornell," by H. M. Fitzpatrick, 1926 (photocopy).