The collection contains scattered correspondence, etc, of Kansas U.S. Senators collected over the years by various individuals.

Business forms and legal documents related to business and professional interests of Arthur B. Havens, a real estate broker and collection agent in the early history of Leavenworth, Kansas. The papers include documents of the Kansas Immigration Society and communications from Leavenworth newspaperman Daniel Read Anthony and from Isaac Peckham Christiancy, a former Michigan senator and supreme court justice.