"'Squarecrow Magic Kit' containing blue plastic disappearing coin case, jug with secret chamber, paper to 'pass a quarter through a hole the size of a dime,' and to make the pig jump in the pen WITH advertising card cut off the back of a Chex box"
H. Adrian Smith Magic Objects Collection.
Brown Digital Repository. Brown University Library.
https://repository.library.brown.edu/studio/item/bdr:420136/