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
Stephen Lyttelton chose to fly on his own and he urged Wintour to do the same. Wintour did not listen to him but proceeded to Holbeche House, where he saw that the conspirators were alive, but some of them were injured. Robert Wintour was one of the conspirators who fled from Holbeche House the night between 7 to 8 November and he met up with Littleton shortly thereafter. On January 9, 1606, they both were arrested. They had spent two months on a flight where they were hiding in barns and houses and at one time they had to block a drunk