At this point in her thoughts she gave a little half-unconscious sigh. Mechanically she folded up Sophy Lansing’s letter, and as she did so, noticed that a slip of printed paper had fallen out of it and lay on the floor. She turned herself on her reclining chair and stooped for it,--then as she picked it up realised that it must be the advertisement in the five different languages which her friend had mentioned. Glancing carelessly over it at first, but afterwards more attentively, her interest was aroused by its unusual wording, and then as she read it over and over again she found in it a singular attraction. It ran as follows: “To ANY WOMAN who is alone in the world WITHOUT CLAIMS on HER TIME or HER AFFECTIONS. “A SCIENTIST, engaged in very IMPORTANT and DIFFICULT WORK, requires the ASSISTANCE and CO-OPERATION of a Courageous and Determined Woman of mature years. She must have a fair knowledge of modern science, and must not shrink from dangerous experiments or be afraid to take risks in the pursuit of discoveries which may be beneficial to the human race. Every personal care, consideration and courtesy will be shown towards her, and she will be paid a handsome sum for her services and be provided with full board and lodging in an elegant suite of apartments placed freely at her disposal. She must be prepared to devote herself for one or two years entirely to the study of very intricate problems in chemistry, concerning which she will be expected to maintain the strictest confidence. She must be well educated, especially in languages and literature, and she must have no ties of any kind or business which can interrupt or distract her attention from the serious course of training which it will be necessary for her to pursue. This Advertisement cannot be answered by letter. Each applicant must present herself personally and alone between the hours of 6 a.m. and 8 a.m. on Tuesdays and Fridays only to “DR. FÉODOR DIMITRIUS, “Château Fragonard, “Geneva.” The more Diana studied this singular announcement, the more remarkable and fascinating did it seem. The very hours named as the only suitable ones for interviewing applicants, between six and eight in the morning, were unusual enough, and the whole wording of the advertisement implied something mysterious and out of the common. “Though I dare say it is, as Sophy suggests, only a snare of some sort,” she thought. “And yet to me it sounds genuine. But I don’t think this Dr. Féodor Dimitrius will get the kind of woman he wants easily. A handsome salary with board and lodging are tempting enough, but few women would be inclined to ‘take risks’ in the inventions and discoveries of modern science. Some of them are altogether too terrible!”