Crossley was a lawyer in Winterset, Ia., a member of the Iowa State Senate, 1900-1907, and an active supporter of the statewide primary law. Collection includes correspondence (1894-1954): personal and formal, college class notes from Yale University (1898), addresses, legal documents, newspaper clippings, scrapbooks, published materials, maps, photographs, his diary which documents his experiences during WWI, and other miscellaneous materials.