Thanks for all the info, Jim Dixon. I didn't know that about the one-time use of lists. That is good to know.

As for the man who heated his place using bulk mail, I have my doubts. Paper burns very fast and is probably very inefficient fuel. It also produces particularly irritating smoke and soot. I wonder what shape a chimney would be in after burning a lot of paper.

Remember when you could buy a device for rolling newspapers into 'logs' for burning? I don't see the devices for sale any more. Perhaps people tried them and the whole thing just didn't work.