Have you ever been to a tannery? A leather tannery? It stinks to high heaven. When we were given a sprig of mint leaves at the entrance, I couldn't figure out what it was for. It was to put it up your nose so that the smell wouldn't overpower you. You can still smell the foulness. I can't imagine a worse job, stumping on the hide in those smelly vats. It's not much worse than the garbage collectors of Cairo. Anyway it was an incredible experience and the visit to Fes and to Morocco was so incredible.