I love this illustration, and I hope I can find the chain in one of the boxes. Unfortunately, the entire page seemed to have ripped off a long time ago. I have been lifting things out very carefully since the pages are so fragile. Whenever this ripped, it would seem the bottom half was discarded. I found an ad for this trick in an old scan of Popular Mechanics Magazine from May of 1930. I am not sure if that is from where this particular trick was purchased, but I think it is a good start to discover where all of this came from.