Abstract: Letters and other papers which McCormick had kept in his home rather than in his office. The contents of many of the folders are fragmentary, and in effect supplement correspondence or records in other McCormick series. Many of the papers relate to organizations and educational projects, especially the YWCA and YMCA. Included are letters by, to, or about numerous members and relatives of the McCormick family, letters from personal friends, material relating to McCormick's patronage of musicians and musical events, and data on household expenses and maintenance; correspondence with the Rev. James G. K. McClure, president of Lake Forest College and president of the McCormick Theological Seminary, and his wife; and recollections of ten men employed by McCormick, Deering, and other agricultural implement manufacturers in the late nineteenth and early twentieth centuries.