At age 37, Mary turned her attention to finding a husband and producing an heir, thus preventing the Protestant Elizabeth (still her successor under the terms of Henry VIII's will and the Act of Succession of 1544) from succeeding to the throne. Edward Courtenay and Reginald Pole were both mentioned as prospective suitors, but her cousin Charles V suggested she marry his only son, Prince Philip of Spain.[82] Philip had a son from a previous marriage, and was heir apparent to vast territories in Continental Europe and the New World. As part of the marriage negotiations, a portrait of Philip by Titian was sent to her in September 1553.[83] Lord Chancellor Gardiner and the House of Commons unsuccessfully petitioned her to consider marrying an Englishman, fearing that England would be relegated to a dependency of the Habsburgs.[84] The marriage was unpopular with the English; Gardiner and his allies opposed it on the basis of patriotism, while Protestants were motivated by a fear of Catholicism.[85] When Mary insisted on marrying Philip, insurrections broke out. Thomas Wyatt the younger led a force from Kent to depose Mary in favour of Elizabeth, as part of a wider conspiracy now known as Wyatt's rebellion, which also involved the Duke of Suffolk, the father of Lady Jane.[86] Mary declared publicly that she would summon Parliament to discuss the marriage, and if Parliament decided that the marriage was not to the advantage of the kingdom, she would refrain from pursuing it.[87] On reaching London, Wyatt was defeated and captured. Wyatt, the Duke of Suffolk, his daughter Lady Jane, and her husband Guildford Dudley were executed. Courtenay, who was implicated in the plot, was imprisoned, and then exiled. Elizabeth, though protesting her innocence in the Wyatt affair, was imprisoned in the Tower of London for two months, then was put under house arrest at Woodstock Palace.[88]