The collection contains letters written to Salter and notes written by Salter. The letters include both personal correspondence and that relating to his affairs: church business, business of Iowa College, Salter’s research into the history of the Dodge family, and a variety of other concerns. One letter of note is from James S. Graham in 1884 who recounts his experience watching President Lincoln while he reviewed the 68th Illinois Infantry Volunteers. Also included is a Saloon Passengers’ List and Track Card from an 1881 voyage on the S.S. Bolivia.