Letter stencils are a great tool for artists, designers, draftsmen, and anyone else who wants a quick, easy, low-tech way to add consistent and precise lettering to art, murals, signs, and other ...
You report that prehistoric hand stencils on cave walls with various digits missing could represent a sign language. I am a computer scientist, not a linguist, so I have a different take on the matter ...
The hands could represent signals used while hunting animals, as suggested, but perhaps we are seeing an early classroom, and the stencilled wall is a blackboard to teach youngsters which gesture ...