D. C. Allen was a Three Oaks, Michigan book dealer and collector of material on the House of David, an adventist cult founded in England. The leader of this cult was Benjamin Purnell who made Benton Harbor his home and the site of his follower's business activities. The Allen collection (formerly housed at the Wyoming American Heritage Center) consists of most of the publications by and about the Israelite House of David, scattered manuscript materials mainly documenting the colony's business operations and court cases involving Purnell and the colony, and photographs and postcards depicting activities of the colony.
The collection gathered together by D. C. Allen includes published materials, manuscripts and other paper documentation, and photographs, postcards, and other visual materials. The published material consists mainly of books and pamphlets written by House of David founder "King Benjamin" Purnell and his wife Mary and others associated with the House of David. This collection was formerly stored at the University of Wyoming American Heritage Center.