Consists mostly of manuscript materials from the Western Union Museum. The material includes a series of fragmentary administrative records, a limited amount of correspondence, fairly useful reference materials on telegraphy, and a series of telegram examples, 1857-1948. The collection is particularly strong in photographs. In addition to photoprints of Western Union facilities, pole yards, and employees, there is a wealth of images of telegraphic equipment and installations. There also are many telegraph facsimiles, 1925-1942 as well as a log book concerning cable for 1934 with correspondence.