One morning as he sat opposite to her he politely passed the salt. From that chance meeting they had each day chatted at the Cedar Tea-Rooms, gradually becoming friends, until one Saturday, he had invited her to Hampton Court, and they had spent the afternoon in the old-world gardens of the Palace so reminiscent of Henry the Eighth and Cardinal Wolsey. That day’s excursion had frequently been repeated, for Marigold’s great blue eyes attracted the young man, until one day he cleverly arranged that she should meet his sister—with whom he lived out at Ealing—and the outcome was an invitation to tea on the following Sunday. Thus the chance-made acquaintance ripened until they found themselves looking eagerly forward to lunch time on five days each week, when they would rush to their meeting-place to chatter and enjoy the hour’s relaxation from work. Hence it was not surprising that Gerald had fallen violently in love with Marigold, though he had never summoned up sufficient courage to declare his affection. "What you’ve told me is a problem which certainly requires investigation," he remarked reflectively after a long silence. "If your aunt is in any real danger, then she should, I quite agree, leave the house. At present, however, I cannot see that she is, or why she should know anything. It is our duty to watch and to form our own conclusions." "Ah!" cried the girl gratefully, "it’s really awfully kind of you, Gerald, to promise to help me. As you know, I have very few men friends, and not one, save yourself, in whom I would place this confidence." "You know me, Marigold," he said, with a smile of satisfaction. "You know that I will do all I can to help you to solve this extraordinary problem." The problem which the girl had placed before her admirer was certainly a most puzzling one—sufficiently puzzling, indeed, to excite the curiosity of anybody to whom it was presented. Had Marigold Ramsay but foreseen the terrible vortex of uncertainty and peril into which their inquiries would lead them, it is probable that she would have hesitated ere she embarked upon an investigation so full of personal risk to both. In her ignorance of the cunningly-devised counter-plot, which shielded from exposure and justice one of the most diabolical and remarkable conspiracies of modern times, she and her admirer entered cheerfully upon a policy which led to many exciting and perilous adventures, some of which I intend to chronicle in these pages. That you, my reader, shall clearly understand the cause of Marigold Ramsay’s suspicions, it will be as well to here unfold certain queer circumstances which had happened on the previous Thursday night.