Founded in the late 19th century at a time when industry was exploding and immigrants flooding into our nation, the International Correspondence Schools (I.C.S.) of Scranton, PA, served the educational needs of thousands of young Americans citizens. Their course offerings were diverse, ranging from rock boring, blasting, coal cutting and timbering to a textbooks on mercantile decoration and English grammar. Published by the American Textbook Co., I.C.S. books and manuals provided serious and highly informative treatments on topics which were vital to the successful operation of the burgeoning nation and served as bridges between a restless untrained workforce and the promise of a new life. Our complete set of maps of the 12 Divisions of the United States Railway Mail Service would have been help in proving aptitude and ensuring advancement in one of the essential communications links of that day. Finding a complete set in such good condition and in its original slipcase is rare. Condition: Maps, Excellent , Slipcase, expected wear. Dimensions: Slipcase, 5.5" x 9.5" x 1", individual maps, 20.5" x 16.5".