I am surprised he drew them with paper and pencils. They were some of the most illiterate people I have ever seen. 99% cant read. That is why the religious leaders have such control. “I will tell you what the book said.”I remember on the construction site they were putting up the plywood forms to lay the concrete on the spillways. Simple job. There was a vertical blue line with dots. Follow the line and put a nail in each dot. When complete move to the next line. Explanations went back in forth. Finally the local doing the job went okay. Put one nail, then the next. So the boss left and came back two hours later. There sat the guy squatting like they do. Bag of nails and hammer on the floor. He had done four more nails after the first two. The boss went what the hell what are you doing? Explanation. The guy pointed at a nail where the “head” was facing the wall. He called them wrong nails. Never thought to turn them over. So he gave up.Seen several sitting in the shade of those huge earth scrapers with the really big tires. Sitting right in front of the tire. One got into it started it and drove over six of them.In my dads shop they would begin to air up one of those big tires and forget they were airing it up. It would explode killing four or five who were sitting on the tire drinking tea.So paper and pencil. I mean really.