I know some people in Cairo are a little slow on the uptake, but there are several independent sources, as shown by the Revealing Richard III blog. In a recent series of articles in the Ricardian Bulletin, the team cite:
- Titulus Regius, as composed from the petition to the Three Estates on 26 June 1483;
- Richard III’s letter to Lord Mountjoy, Captain of Calais, two days later;
- The Crowland Chronicle, which independently confirmed the above letter;
- Phillippe de Commynes‘ (above left) contemporaneous (1483) reports to Louis XI;
- Eustace de Chapuys‘ (below left) 1533-4 letters to Charles V, showing that Henry VIII had a lesser dynastic claim to the English throne than Catherine of Aragon, his patron’s aunt;
- A 1486 Year Book, detailing Henry VII’s attempts to persuade Bishop Stillington to confess so that Titulus Regius could be annulled and not just destroyed unread.
The last three all name Stillington or refer to the “Bishop of B”, such that only Bath and Wells fits that description in England during 1483-7. Birmingham, Blackburn, Bradford and Bristol didn’t have Bishops in those days.
In fact, by building on John Ashdown-Hill’s decade of painstaking research, the Revealing Richard team even link to the text of Titulus Regius. These points don’t even mention Stillington’s imprisonment, the Desmond executions, Clarence’s imprisonment and execution, Catesby’s execution, Lady Eleanor’s land dealings and testament together with Lord Sudeley’s adverse treatment and More‘s “Lady Lucy” false trail.