The Richardson Family Collection contains personal correspondence, financial records, awards/certificates, personal records, educational records, promotional literature, tourist literature, business cards, Cheyenne Frontier Days records, business and financial records of the Chihuahua Lumber Company, Consolidated Oil Royalty Company, the Richardson Brothers, and the Richardson Trust Association, masonic records, and writings of Warren Richardson, Sr. Much of the correspondence reveals much about early Cheyenne and the family’s social and intellectual interests. There is a file called "Richardson Family Correspondence" which contains letters to whom the original addressee is unknown.