This ATCA collection brings together mail art, correspondence, photographs, slides, compact discs, show announcements/posters, writings, and other ephemera related to or by various artists.

The Dr. Richard Caplan Sherlock Holmes Collection consists of publications, ephemera, and a variety of artifacts collected throughout Caplan's lifetime as an avid Sherlock Holmes enthusiast. Some materials included in the collection are club journals and magazines, convention stationery, board games, magnifying glasses, smoking pipes, deerstalker hats, and an umbrella and cane, both with a sculpture of Sherlock Holmes for the handles.

Noted science fiction fan and fanzine editor from Seattle, Washington. Correspondence, together with some additional ephemera.

This collection is made of up Civil War Letters and Memorabillia relating to Horatio Pitcher.

Lawyer and judge. Mostly concerns Bollinger's studies of Abraham Lincoln and as a collector of Lincolniana.

Correspondence, speeches, articles, leaflets, clippings, scrapbooks and a sketchbook, mostly dealing with politics, conservation, or family affairs, assembled by newspaper cartoonist Ding Darling of The Des Moines Register. There are also some 6,000 original pen-and-ink cartoons drawn by Darling.

Railroadiana collection. Time tables, train registers, train orders, menus, tickets, etc.

Advertising agent, printer, and newspaper editor, of Iowa City, Iowa. Correspondence, clippings, printed matter, memorabilia, and other material relating to printing and advertising.

Commercial lecture bureau and booking agency for Chautauqua and lyceums throughout the United States and parts of Canada. Office files of the Redpath-Vawter Bureau of Cedar Rapids, IA, the Redpath-Chicago Bureau run by Harry P. Harrison and Charles Horner's Redpath Chautauquas. Included are: talent files consisting of correspondence, contracts, publicity brochures, and advertising flyers; business files including employee records; geographical location files with materials about cities and towns that sponsored Chautauquas and lyceums; periodicals; daybooks, cashbooks; and photographs.

Chautauqua and radio performers. Correspondence, clippings, photographs, and ephemera.