This folder contains correspondence to Clayton Hawkes and his business partner, Carroll Miller. Topics include circus tents, proposals for performances (including trapeze and knife throwing). Two letters from Dan Sherman, later the Martin Bros. ringmaster, are typed on the blank versos of handbills for the Sherman & Deforest Show. Other correspondents include Willard T. Tard Northrop, George Campbell of "Old West Town" in New Milford, PA, and Johnny Fulghum of Richmond, VA.

This folder contains a price list sent by the Central Show Printing Company of Mason City, IA in May 1934, with cover letter; and four advertising handbills from Al. Wallace of Chicago, IL. The Wallace ads offer band uniforms and caps.

This folder contains bills and receipts to Martin Bros. Circus for April through July, 1936. Billers include H. T. Hunt Co. of Binghamton for lumber; Fitch Mail Order Print of Binghamton for printing 5000 school tickets; Ben. L. Joggerst of Binghamton for the production of a stencil; Norton Ferris of Lockville for cage wagons and a ticket wagon; the Oneonta Grocery Company for roasted peanuts and Cracker Jacks; and Roy Robinson for salary.

This folder contains handbills/posters for:

- Bogart's Trained Animals, performing on Hawkes' Flat on Saturday, 31 August. Dated in manuscript "1939," but likely 1940, as 31 August fell on a Saturday that year.

- three copies advertising Clayton's Tent Show, one dated in manuscript "1940s."

- folded poster for Castle Creek Zoo Farm and Kiddieland, dated in manuscript "1956-57-58."

This magazine includes information on various circus shows, but "Martin Bros. Trained Animal Circus" is featuring at the top of the front cover. The piece about the circus appears on pp. 55-56. The anonymous writer lauds Martin Bros. for their adherence to the "one-ring" performance style and notes the circus' animal menagerie and the side show of wonders and curiosities.