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
Ambrose Rookwood he rented Clopton House near Stratford, and moved there after Michaelmas. He took with him several Catholic religious symbols, such as chalices, crucifixes, vestments, Latin books and praying beads. These were concealed in a cellar built by the Jesuit Nicholas Owen. Toward the end of October he joined Keyes at his lodgings in London. A few days before the planned explosion he changed his mind about the sword he had ordered John Craddock to make, and had the cutler replace the grip with a gold one. The modified sword, which in total probably cost Rookwood more than £20, was delivered