The Robinson Telegraphic Cipher

"The Robinson Telegraphic Cipher" by Stephen L. (Telegrapher) Robinson is a guide created for those in the late 1800s grain trade. It's all about secret codes, made just for people buying and selling grain. The book gives them a way to talk to each other quickly and privately using telegraphs. The introduction explains that the book was updated because the grain market changed, bringing in new types of grain and ways to ship them. The updated version has both old and new secret words, with the new ones marked clearly. There's also a guide to help people find what they're looking for, with different parts for different types of messages used in the grain business.