Information on this story from the French magazine Back-Up and Roy Rogers: A Biography... by Robert W. Phillips, as submitted by Stephane Petit via the GCD Errors list, August 2009.
Gaylord Du Bois's Account Books Sorted by Title, compiled from the original account books by Randall W. Scott states: "Roy Rogers at Christmas at Tanner's. 28 half pages. For March of Comics, December issue. Sent March 19, 1954." ~Dave Porta