Topcliffe was a tireless agent of the English government's determination to eradicate Catholicism from England. At the height of his power, from the late 1580s until 1595, he hunted, captured, arrested, and interrogated many prisoners - often with torture. Topcliffe's infamous interrogations took place either in the Tower of London, in Bridewell prison, or even at his own house in Westminster, next to the Gatehouse prison. Exiled Catholic intelligencer Richard Verstegan regularly reported on Topcliffe's activities, condemning him "whose inhuman cruelty is so great, as he will not spare to extend any torture whatsoever". His favorite method (which he may have introduced) was to hang a prisoner by the hands in the gauntlets or manacles, a procedure which, though exquisitely painful, left no permanent injury if properly administered. Improperly administered, it caused permanent internal injury and even death. There is some evidence that he used psychological torture as well, keeping prisoners awake, for instance. Furthermore, Topcliffe frequently used rape as a method of extracting information.