The pictographic Hobo Code

“The pictographic Hobo Code is a fascinating system of symbols understood among the hobo community. Because hobos weren’t typically welcomed (and were often illiterate), messages left for others in the community had to be easy for hobos to read but look like little more than random markings to everyone else to maintain an element of secrecy. The code features certain elements that appear in more than one symbol, such as the circles and arrows that made up the directional symbols. Hash marks or crossed lines usually meant danger in some form.”