The Finlay B. Matheson collection includes more than 2,411 photographs; 112 maps, surveys, and architectural plans; and 13 books related to William John Matheson and his immediate family. Estate documents and other documents containing historical and biographical information pertaining to the Matheson family and their various business ventures can also be found within this collection, as well as drawings, postcards, and some of the first aerial view photographs of Key Biscayne, Coconut Grove, the Miami River, and the Florida Keys. Florida's landscape during the early 20th century is captured throughout the various albums and scrapbooks and attests to a more leisurely lifestyle before the advent of skyscrapers and multi-lane highways. Furthermore, the collection provides an in-depth glimpse into the burgeoning social life of early inhabitants who gathered at the Biscayne Bay Yacht Club.

Dr. Vincent A. Jablon was a podiatrist and professor of Roentgenology, who received from the University of Miami in 1931. While at the University of Miami, he worked for the Curtiss Airplane and Motor Company and was part of the Omicron Phi fraternity, which was based on the interest in aviation. The Vincent A. Jabon papers contain materials pertaining to these topics, in the form of scrapbooks of Omicron Phi activities, photographs of Curtiss airplanes, clippings, Jabon's mechanic identity card, letters, photocopies, Jabon's 1930 class schedule, and his jacket, goggles, and pilot hat.

Donald Edward Spencer was an archivist and historian who served as the head of the American prosecution document room at the Nuremburg Trials following World War II. This collection includes primary sources he used to assemble for a biography of Hitler's Deputy, Rudolf Hess, as well as a manuscript of said biography.