The included documents are: a business card for K. S. Williams of Crown Metal Products Company, a receipt, a postcard featuring "The Little Toot" train at Forest Park Highlands, an advertisement for real steam railroads, and four pages of notes on yellow notepad paper.
This advertisement provides images, features, and specifications for the "Type B Impenetrable" gate. The back of the flier has two illustrations, one of children being prevented from sneaking into the park, and one focusing on the ease of the gate's use.