Series consists chiefly of photographs taken and other materials collected by Robert Irwin, partly in his capacity as secretary of a Massachusetts state commission to identify and care for graves of Massachusetts World War I dead abroad, and to document events, activities, and settings involving the 26th (Yankee) Division, Massachusetts National Guard, during and after World War I. Files contain lantern slides, photograph album, panoramic photographs menus, mess tickets, pamphlets, and photocopied newsclippings. Topics include: Fort Dowling (Framingham, Mass.), French battlefields and villages, and graves of American war dead overseas.