Contains 26 reels of microfilm with positive images and 26 reels of microfilm with negative images of the same materials. The microfilm include copies of a biography, correspondence, certificates, diaries, photographs, and articles. Also included are paper copies of articles, pamphlets, and a map. The materials relate to Blom's research on Mayan archaeology and his expeditions to Mexico.

This collection contains 22 glass plate negatives of a variety of things, including Mayan symbols and ruins, children canoeing, children playing by a river and in a forest, the Woolworth and Municipal Buildings in New York City, images of Joseph Smith and his residences, the Sacred Grove, the Susquehanna River, Lucy Smith, Oliver Cowdery, David Whitmer, and Martin Harris. Prints have been made from the glass plate negatives for patron use.