Thank you! That industrious fellow definitely was persistent in going about making that stone axe! While hunting caribou up in the arctic north of Yellowknife 20 years ago my archeology-oriented buddy (who'd lived up there for 20 years) was quick to point out evidence of Barren Land black spruces that had been cut down via stone tools. Materials such as wood don't readily rot up there so evidence of tent frames, canoes, tree stumps etc. remain visible for centuries. Steel tool chop marks have considerably cleaner edges than the furry-looking results of stone choppers. Presumably the users had to strike 10-20 times more often than someone wielding a steel axe but they did accomplish what they set out to do.