“in the upper right corner, perhaps, a homeless man or woman has left a not about to be careful should you sleep there. they have their own language-(Rach) a blogger here told me there was book where you could learn it and when traveling, discern little painted images under bridges and over-passes from your ride- and along railroad tracks.
R-It’s called Hobo Code. See some here. I love that there is a symbol for “kind person lives here, tell a pitiful story.” Sometimes that’s really all it takes to get through the door.