The Ruth Bitting Hamm collection contains several folders in four boxes. The items included are correspondence, maps, posters, photographs, ledger books, and genealogical information about the ancestors and relatives of Ruth Bitting Hamm. There are several land deeds and mortgages and daily journals. There are also several books about Central Illinois and several about her family. The collection was donated by her estate. The collection, especially the correspondence was left in the groupings chosen by Ruth Hamm.