 Catesby, by then at White Webbs near Enfield Chase with the Wright brothers, decided that the letter did not constitute a sufficiently serious threat to the scheme, and he decided to forge ahead.On 4 November Percy visited his patron, Henry Percy, 9th Earl of Northumberland, to see if he could discern what rumours surrounded the letter.He returned to London and assured John, Thomas Wintour and Robert Keyes that they had nothing to be concerned about.