Rocky Mountain News, 5/31/1911 Page 10
David O. Wilhelm Came to Colorado in '61; Succumbs to Heart Attack.
David O. Wilhelm, publisher of the first "History and Directory of Denver", and a resident of this city since 1861, died yesterday at Idaho Springs, where he went on a business trip. Heart failure is given as the cause of death. The body will be brought to this city and the funeral will be held Thursday at 2 o'clock from the undertaking establishment of Walley & Rollins.
Wilhelm was born in Dayton, Ohio, sixty-nine years ago. When 19 years old he crossed the plains in a prairie schooner, settling in Denver and establishing a cigar and tobacco store on Blake Street. In 1867 Wilhelm published the first history of Denver, and two years later he re-published it on account of the demand for the book. He was employed by The Rocky Mountain News in 1869 and 1870. Wilhelm married Miss Ruth Freeman in 1870.
Mrs. Wilhelm came to Colorado two years before her husband and survives him. He is survived also by a daughter, Mrs. Augusta Williams. Wilhelm was a member of the Sons of Colorado.