Robert and Thomas Wintour the continent and again failed to elicit Spanish support, but instead met Guy Fawkes, with whom he returned to England. Robert, a devout Catholic who inherited Huddington Court near Worcester, joined the conspiracy the following year. The plot began to unravel following the delivery of an anonymous letter to William Parker, 4th Baron Monteagle, warning him to stay away from Parliament. Thomas and Catesby confronted Monteagle's brother-in-law, the recently recruited Francis Tresham, threatening to kill him, but Tresham managed to convince them of his innocence. At that stage Thomas reportedly asked Catesby to abandon the scheme, to no avail. When
Robert and Thomas Wintour Tresham. The latter's involvement in the plot has long been the subject of controversy, as on 26 October his brother-in-law William Parker, 4th Baron Monteagle, received an anonymous letter while at home, warning him to stay away from Parliament. Thomas went with Catesby to confront Tresham on the matter, threatening to "hang him" if he did not exonerate himself. Tresham managed to convince the pair that he was innocent, but Thomas then tried unsuccessfully to persuade Catesby to abandon the plot. His pleas were in vain; Catesby's position was echoed by Percy, who at a meeting of the three in