Hobo Symbols: Dating back to the Depression, when many people were homeless and on the move, this code of signs were used be Hobos to communicate good spots to stay & places to avoid. "Here is the place!
Outside of the turks head knot variants, there are few techniques that are appropriate for making paracord knife wraps. I found an image of a knife wrap that David Hopper made. It was a recreation of an old sword wrapping technique