I recently purchased this set of two instructional booklets put out by the International Correspondence Schools of Scranton, PA on the subject of railroad brake rigging. I'm working on some projects at work that involve brake rigging and thought they might be useful based on the digitized online copy I found.
Upon opening them this evening, I found the stamp of a former owner who may be familiar to anybody that knows the history of the Strasburg Railroad in PA. J. Huber Leath was one of the original founders of the tourist railroad that exists there today. It was sort of a neat piece of history that makes an interesting book even better.