In addition to those brought by Scott and by Worden, Irwin carried 96 covers, one with a "flown-to-the-Moon" theme, eight with an Apollo 15 design, and 87 covers honoring Apollo 12, carried as a favor for Barbara Gordon, wife of Apollo 12 astronaut Dick Gordon. Barbara Gordon, a stamp collector, had wanted her husband to take the covers on his lunar mission, but he had refused. The flown-to-the-moon cover was a favor for a friend of Dick Gordon. Apollo 15 carried the cover from the Postal Service to be canceled on the surface of the Moon. The agency also sent a backup, stowed in the Command Module with another cancellation device, for use on the homeward journey if Scott did not get to postmark the lunar cover.