Correspondence, extensive grape breeding notes and notebooks, drawings of grape plants, drawings and sketches for wine labels for the New York State Agricultural Experiment Station, Geneva Cellars. Includes rootstock and grape information from the U.S., Georgia (in the former U.S.S.R.), France, and Germany. Information about his Hammondsport vineyard.

Correspondence and research materials pertaining to grapes. Correspondents include H. P. Olmo, Richard Wellington, and A. B. Stout. Also copies of some published items and project records of Pearson.