Princes in the Tower of 14; both had predeceased the King. However, two lead coffins clearly labelled as George Plantagenet and Mary Plantagenet were subsequently discovered elsewhere in the Chapel (during the excavation for the royal tomb house for King George III under the Wolsey tomb-house in 1810–13), and were moved into the adjoining vault of Edward IV's, but at the time no effort was made to identify the two lead coffins already in Edward IV's vault. In the late 1990s, work was being carried out near and around Edward IV's tomb in St George's Chapel; the floor area was excavated to replace an
Princes in the Tower goal. This theory formed the basis of Sharon Penman's historical novel, "The Sunne in Splendour". Henry VII (Henry Tudor), following his seizure of the crown, executed some of the rival claimants to the throne. One who was either executed or died in captivity was John of Gloucester, illegitimate son of Richard III. Henry was out of the country between the princes' disappearance and August 1485, thus his only opportunity to murder them would have been after his accession in 1485. Pollard suggests Henry (or those acting on his orders) is "the only plausible alternative to Richard III." The year after