 Here he frequently visited the house of Michel de Castelnau, Sieur de Mauvissiere, where he met Giordano Bruno, currently staying there.He was soon recruited by Francis Walsingham to act as a spy until 1583, by which time he felt his consorting with French Catholics was compromising his religious integrity.His letters to Walsingham mention his widowed mother's concern at his role in London and her moneylending activities, and information he obtained in January 1583 from the exiled Scottish Duke of Lennox.