Charles the Twelfth year in succession. At the Doncaster St Leger meeting Charles the Twelfth finished unplaced under top weight of 138 pounds in the Great Yorkshire Handicap and ran second to Bee's-wing in the Doncaster Cup. Later that month Charles the Twelfth ran at Kelso where he finished second to Cabrerea in the Roxburgh Gold Cup and was beaten when attempting to concede 40 pounds to the three-year-old Whistle Blinkie in a two and a half-mile handicap. On 7 October at the Royal Caledonian Hunt meeting at Perth Racecourse Charles the Twelfth retained the Challenge Whip by beating Foxberry over two miles.
Thomas St. Leger has been suggested that Buckingham had the heiress in mind as a bride for his own eldest son Edward. This never came to pass, for both St. Leger and Buckingham ended up in rebellion against the new king. St Leger had been unshakably faithful to Edward IV and, like many of the other rebels of the rebellion of 1483, was undoubtedly distressed at Edward V having disappeared from sight after having been deprived of his crown. When the rebellion floundered, St. Leger continued the fight in Exeter, but was captured. He was executed on 13 November 1483, at Exeter Castle,