In "Great Expectations", Mr. Dickens has Jo Gargery singing "Old Clem, and we'll hammer boys round. Old Clem, with a thump and a sound. Old Clem, beat it out beat it out. Old Clem with a clink for the stout." Remarking that St. Clement was the patron saint of blacksmiths. (He was martyred by having an anvil tied around his neck and being thrown in the sea.)
My great uncle, John Caldwell, was going to Cornell in the 1890s, planning on becoming an engineer. He and several of his fellow students decided they'd like to learn something of blacksmithing, and found a smith who would train them. He asked one of the young men for his watch, and worked it so he got the best watch of the lot. Then he put it on his anvil, swung back his hammer, and brought it down a quarter of an inch over the watch. Then he told the boys when they were done training that they would be able to do that too.
Uncle John wound up as an orthopedic surgeon. He made prosthesises and medical instruments, so the training stood him in good stead. Anyway, I thought I'd pass on the story.