Editing Lady Katherine Grey (section)

==First marriage==
Some time before August 1552, Katherine Grey was betrothed to [[Henry Herbert, 2nd Earl of Pembroke|Henry, Lord Herbert]], [[heir apparent]] to [[William Herbert, 1st Earl of Pembroke (1551 creation)|William Herbert, 1st Earl of Pembroke]].<ref>de Lisle, p. 302.</ref> In 1553, as Edward VI was dying, the King and his Chief Minister, [[John Dudley, 1st Duke of Northumberland]], planned to exclude Edward's sister Mary Tudor from the succession in favour of Katherine's elder sister, Jane. According to the [[Letters Patent]] of 21 June 1553, Lady Katherine was to be second in the line of succession behind her sister and heirs-male.<ref>Ives, pp. 147, 150.</ref> Jane had been married to Northumberland's son, [[Lord Guildford Dudley]], on 25 May 1553. On the same occasion, Katherine was married to Lord Herbert at Durham House. After the wedding, Katherine (''now'' Lady Herbert) went to live with her husband at [[Baynard's Castle]] beside the Thames.<ref>Chapman, p. 165.</ref>  When Jane's accession to the throne failed, Henry's father sought to distance himself from the Grey family by separating his son from Katherine and seeking the [[annulment]] of the marriage;<ref>Chapman, pp. 166–167, 169.</ref> this was probably achieved in early 1554, as the union had not been consummated.<ref>Haynes, p. 26.</ref> Meanwhile, her sister Jane and her father (the [[Duke of Suffolk]]) had been executed in February 1554 after the suppression of [[Wyatt's Rebellion]].<ref>Ives, p. 287.</ref>