The collection consists of four typed letters from the World War I and the Great Depression eras. The first document is a Special Order containing Halle D. Robb's military assignment from 1917. The next two letters are addressed to Sergeant Major Halle D. Robb wishing him well in his forthcoming civilian life. The fourth letter is dated 1930 and a General Agent from Union Pacific Railroad Company is making an introduction for a "Mr. H.A. Robb."