Between July and October 1580, Robert Persons and Edmund Campion, who had landed at Dover in June, ‘passed through the most part of the shires of England, preaching and administering the sacraments in almost every gentleman's and nobleman's house that we passed by, whether he was Catholic or not, provided he had any Catholics in his house to hear us’. Between Christmas 1580 and Whitsun 1581 Campion went on a similar journey to the North, the itinerary of which can be recovered in fair detail from entries in the Acts of the Privy Council and from a summary of the subsequent examinations which was annotated by Lord Burghley. The mission of Campion and Persons (and of the dozen or so others who accompanied them from Rome) has rightly been regarded as a pivotal event in the story of Elizabethan recusancy. But no serious attempt has ever been made to reconstruct their itineraries in 1580.