Many years ago when they had too much leather to cope with, I was given tuition on how to wash the stuff. All, at that time, done under cold running water (fingers went white after a bit). One day a child's shoe turned up and when I had carefully cleaned it, it was the length of my hand from base of thumb to fingertips - about 6 inches long.
I could see the impression of the toes quite clearly. It was just the shoe sole, nothing else. No, there was no photograph, didn't at the time think I should, so resisted the temptation.
Can still see it now..... on my hand.....hmmm