Some corrections and additions to the Complete Peerage: Volume 3: Clinton (PROPOSED CORRECTIONS)

CLINTON

Volume 3, page 315:
He [William (de Clinton), Lord Clinton] m., 3rdly, Mary, widow of Sir Henry RETFORD, of Carlton Paynel, and of Castlethorpe, co. Lincoln. He d. 30 July (or 20 Aug.) 1431. His widow (who occurs as such 7 Jan. 1431/2) m., 3rdly, Sir John HERON, of Northumberland. She d. 2 Feb. 1458/9.

It appears that she was already the widow of Sir John Heron when she married William Clinton, as she is described in 37 Henry VI [1458 or 1459] as Mary, who was the wife of William Clynton, knight, and formerly of John Heron, knight.

[This evidence was pointed out by Tony Ingham in September 2002]