That's fascinating! It looks like you're into the history of role-playing games. I've heard that the origins of role-playing games were war games with miniatures from the late 19th century, but it looks like you have some older materials.

I don't know if this is the right way to comment on your comment, but sort of! Modern tabletop RPGs definitely come from miniatures games, but "Let's Pretend" RPGs are ancient--like, Herodotus mentions one--and collaborative storytelling is old too. That said, H.G. Wells believed miniatures games were ancient too, using the 18th C. novel Tristram Shandy as an example and his experience making them up as another