Contains photographs of María Rosa Oliver spanning her infancy to the 1970s, by various photographers in Argentina, the U.S., and other countries, and photographs of other writers, actors, and friends who were friends of Oliver. In this series, the photographs of María Rosa Oliver and her family members are first, followed by the photographs of Oliver's friends and acquaintances. The photographs of Oliver and her family members are arranged in chronological order, though many photographs are undated, and, thus, the dates are guesses. The photographs of people other than Oliver and her family are arranged alphabetically by the person's surname.

Series 4: Photographs documents the buildings, the social life, and the general atmosphere surrounding the clubs. Time frames for the photographs are noted on the back of each photo.

This series consists of primarily silver gelatin black-and-white photographs of places, family, friends and Moe Berg himself, taken or collected by or about him. There are also a number of copy-prints dating from the 1980s for which the originals are not present, and a number of duplicates. Known individuals are noted at the file-level and include Babe Ruth, "Lefty" O'Doul, Joe Cronin, Hollis Thurston, John F. Kieran, Paul Scherrer and Howard Dix.

This series consists of postcards that have been donated since the processing of the collection in 1996.