He had sent his household ahead of him to Castle Upnor, where they had made ready to board ship and sail to France as soon as he arrived. For he had stayed behind in London, supposedly at great risk, to attend to certain matters of stupendous importance. These matters were, however, far too deep and mystical for Upnor to say anything about them in mixed company. This suggested that they had something to do with Alchemy, or at least that he wished as many people as possible to believe so. "I could not allow certain information to fall into the hands of the usurper and those of his lackeys who pretend to know of matters that are, in truth, beyond their ken."