some years ago I was working on a barn conversion and bricking up an opening on the inside using the old handmade bricks, the boss told me to find any intresting bricks and build them in, there were some with paw prints some with thumb and finger marks, some with letters or numbers scratched in them and a couple that had split open in the kiln one looked like a lady's and one like a bum with a turd comming out, I wonder if they are still built in?