(In the UK) the acting commandant of the Tower of London:his appointment as Lieutenant of the Tower...
Ironically, Wentworth's gaoler, Sir Michael Blount, the Lieutenant of the Tower, was himself dismissed and imprisoned in late 1595 for stockpiling arms in anticipation of the Queen's death.
Sir William Wade, Lieutenant of the Tower, had orders to use whatever means of torture was required to get information from Fawkes.