Douglas Hamilton Thomas, Jr. with unidentified man, undated

The collection contains portraits and photographs related to the Thomas family and associated families. The Duval and Whitridge families are also represented throughout the collection. Professional portraits, photographs of ancestral homes, and travel photographs comprise the collection. Of particular note are photographs of 1 Mount Vernon Place and 1010 Saint Paul Street in Baltimore, Maryland, which include interior views. The families frequently visited Europe, New York, Rhode Island, and Florida on vacation and many of the images were made of these trips.