The indictment charged them with having concerted an invasion and compassed the queen's death by a conspiracy carried on at Reims and at Rome; but Colleton was acquitted.
He was one of the thirteen priests who signed the protestation of allegiance to Queen Elizabeth in 1602; and he opposed the appointment and the administration of the archpriest George Blackwell.
In 1610, when the gaols were filled with priests and laymen who had refused to take the oath of allegiance, Colleton was in The Clink prison in Southwark, and petitioned for his liberty to the king.
On 22 November 1624 he wrote to Pope Urban VIII, requesting a dispensation for the marriage of Prince Charles with Henrietta Maria.
[1] Colleton spent the end of his life in the house of Sir William Roper at Eltham in Kent, where he died on 19 October 1635, aged 87.