Melfort shone at Whitehall as one of the loveliest women in the train of Mary of Modena. After the Revolution, he followed his mistress to France, was repeatedly employed in delicate and perilous commissions, and was thought at Saint Germains to be a devoted servant of the House of Stuart. In truth, however, he had, in one of his journeys to London, sold himself to the new government, and had abjured the faith in which he had been brought up. The honour, if it is to be so called, of turning him from a worthless Papist into a worthless Protestant he ascribed, with characteristic impudence, to the lucid reasoning and blameless life of Tillotson.
In the spring of 1690, Mary of Modena wished to send to her correspondents in London some highly important despatches. As these despatches were too bulky to be concealed in the clothes of a single messenger, it was necessary to employ two confidential persons. Fuller was one. The other was a zealous young Jacobite called Crone. Before they set out, they received full instructions from the Queen herself. Not a scrap of paper was to be detected about them by an ordinary search: but their buttons contained letters written in invisible ink.
The pair proceeded to Calais. The governor of that town furnished them with a boat, which, under cover of the night, set them on the low marshy coast of Kent, near the lighthouse of Dungeness. They walked to a farmhouse, procured horses, and took different roads to London. Fuller hastened to the palace at Kensington, and delivered the documents with which he was charged into the King's hand. The first letter which William unrolled seemed to contain only florid compliments: but a pan of charcoal was lighted: a liquor well known to the diplomatists of that age was applied to the paper: an unsavoury steam filled the closet; and lines full of grave meaning began to appear.
The first thing to be done was to secure Crone. He had unfortunately had time to deliver his letters before he was caught: but a snare was laid for him into which he easily fell. In truth the sincere Jacobites were generally wretched plotters. There was among them an unusually large proportion
