Next to it is the actual "card locator", which reminds me a lot of star finders with it's rotating wheel.
Also with the envelope, but it would not actually fit in the envelope, was this post card with more description of the product:
The reverse side of the information card- I love the method for remembering the suits of cards!
Finally, there was another set of folded instructions:
A seller at Worthopedia says, "REMARKS : A Rare Warehouse Find!!! This Effect is Very Hard to Find in any condition, Let alone in this Mint Condition......." I don't think mine is "mint" but I do have all of the pieces, so that is a pretty good thing. It also says the card is from 1914. I have found more items dated in this range, but also from the 1930's and 1940's.