The collection consists of the bulk (though not entirety) of Art Bimrose's work as a political cartoonist for the Oregonian, including roughly 10,000 original ink drawings. In addition to the ink-drawn cartoons, the collection houses Bimrose's rough drafts, newspaper clippings of the published cartoons, and reproduced prints and transparencies. The political cartoons cover a variety of subjects including current events in Oregon, the United States, and the world, social conditions, and periodic cartoons about everyday subjects such as the weather, changes in seasons, the Portland Rose Festival, and taxation.