Collection of three royalty checks, each signed by author Lawrence Ritter, issued for the classic baseball book The Glory of Their Times. PSA/DNA has encapsulated each check and certified the signature as "Authentic." The checks, issued respectively to Hall of Famers Rube Marquard, Edd Roush, and Stan Coveleski, have all been endorsed by the respective players on the reverse. Each check (8.25 x 3 inches) is a Lawrence Ritter personal check, drawn on the Long Island National Bank of Hicksville, Long Island, New York, and displays normal bank cancellation holes and stamps. Each of the Ritter signatures on the front has been scripted in either blue or black felt-tip pen and grades "9" or "10." All of the checks have been individually encapsulated by PSA/DNA. 1) Rube Marquard. Dated September 11, 1968, and made out to "Richard Marquard" in the amount of $73.80. Endorsed by Marquard twice on the reverse in blue ink (each grading "9"). The first is scripted "Richard Marquard" and the second is scripted "Richard W. Marquard." Ex, with a light vertical fold. 2) Edd Roush. Dated March 20, 1967, and made out to "Edd J. Roush" in the amount of $935.50. Endorsed by "Edd J. Roush" in blue ink ("9") on the reverse. Vg, with a few light creases, staple hole, and tiny border chip. 3) Stan Coveleski. Dated October 17, 1971, and made out to "Stanley Coveleski" in the amount of $67.37. Endorsed by "Stanley Coveleski" in blue ink ("8") on the reverse. Vg, with a small tear and area of surface paper loss on the front. Total: 3 checks. Auction LOA from James Spence/JSA. Pre-certified by Steve Grad and Brian Sobrero/Beckett Authentication Services. Reserve $300. Estimate (open).