Book: 1926 "Selling the Caterpillar"

Hello y'all!

I am new here. I was going to post this in for sale area but figured this maybe a better place to learn more about them first. I inherited these books when my grandfather passed several years ago. I am keeping many items, but some I'd rather sale to someone who can appreciate them more.

"Selling the Caterpillar". I read somewhere online, that they may have been Caterpillars first internal publication. Again, I don't know much about these. I have to editions. One seems to be in very good condition. The other one is in decent condition for being its age. It has a note scribbled on the back of the "Edward Halton Jr" card, who I believe went by Ted. I think this was given to my grandfather from Ted.

Any insight to these texts would be most appreciated.

Thanks