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 in Gloucestershire, and his wife Catherine, daughter of Sir George Throckmorton of Coughton in Warwickshire. As scions of the Throckmortons, they could therefore claim a kinship with plotters like Robert Catesby and Francis Tresham. Their maternal uncle Francis Ingleby, a Catholic priest, was hanged, drawn and quartered at York in 1586, a fact which in the opinion of historian and author Antonia Fraser, "could hardly have failed to leave a stark impression upon the Wintour family." The Wintours took their name from the Welsh Gwyn Tour (White Tower). 'Wyntour' was sometimes used in signatures, but not 'Winter' (as the brothers