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.

This collection contains various renderings of Sharpnack cartoons, many being focused on political issues/trends from the 1980s-early 2000s. Along with cartoons are Sharpnack's cartoon flipbooks that he produced in the late 1990s.

Chemist and Lincoln scholar. Manuscripts, notes, proofs, reviews of books on Lincoln's death and the Civil War, and the manuscript of Eisenschiml's autobiography.