In the summer of 1571, Oxford declared an interest in Cecil's 14 year-old daughter, Anne, and received the queen's consent to the marriage. Anne had been pledged to Philip Sidney two years earlier, but after a year of negotiations Sidney's father, Sir Henry, was declining in the Queen's favour and Cecil suspected financial difficulties. In addition, Cecil had been elevated to the peerage as Lord Burghley in February 1571, thus elevating his daughter's rank, so the negotiations were cancelled. Cecil was displeased with the arrangement, given his daughter's age compared to Oxford’s, and had entertained the idea of marrying her to the Earl of Rutland instead. The marriage was deferred until Anne was fifteen and finally took place at the Palace of Whitehall on 16 December 1571, in a triple wedding with that of Lady Elizabeth Hastings and Edward Somerset, Lord Herbert, and Edward Sutton, 4th Baron Dudley and bride, Mary Howard, with the Queen in attendance. The tying of two young English noblemen of great fortune into Protestant families was not lost on Elizabeth's Catholic enemies. Burghley gave Oxford for his daughter’s dowry land worth £800, and a cash settlement of £3,000. This amount was equal to Oxford’s livery fees and was probably intended to be used as such, but the money vanished without a trace.