In addition to the 1907 ATSF booklet in another topic, I also found this 1892 booklet titled, "Air Brake and Signal Instructions." The cover has an impression dated Aug. 11, 1892, much like a notarial seal creates an impression.
Due to its age, I haven't tried to open it as I would to read it, although the binding seems quite firm. At this point, I have no idea who issued this booklet; who it was intended for; etc.
Any information would be appreciated. Thanks.