Oh wow, those carved lines—sounds like a proto-cartographer's diary. I’d first look for repeating motifs—maybe a spiral marks a river or a notch pattern could be a horizon line. If you trace the path, see if it follows natural features; prehistoric maps usually hide in the geometry of the land. Grab a sketchbook, line them up with the ridge profile, and see if the pattern repeats. Modern mapmakers would just draw a line; I’ll see the rhythm that tells a story.