Neider's letters are all written to his sister, Mrs. T. H. Hack, who lived in Lawrence, Kansas. The letters date from his first day of active service until his discharge and return home. Neider related army life in the United States and France.

This collection contains 76 photographs taken during World War I of the 28th and 91st Divisions of the U.S. Army, which were collected by Dulles, together with two diaries written by Dulles from June 18, 1916 to April 3, 1917 as an enlistee stationed at Fort Bliss, Texas. The collection also has a Dulles family genealogy from ca. 1780-1895.