He bent down to replace the bedclothes which the sick man had thrown off, and as he did so, a faint perfume, sickly and rich, struck his nostrils. It seemed to come from the bandages at the back of the head, and on bending down for a closer inspection, Jen saw that one of these--it was the merest corner which peeped out--was of finer linen than the rest. The fabric was cambric, and with a start which made the blood turn to ice in his veins, Jen realized that it was a woman's handkerchief--its delicacy and border-embroideries assured him of this. "How came this here?" he asked the housemaid, pointing to the scrap of linen. "Oh, that was on the first night, sir," she hastened to explain. "It was put on his head when in the room where he fell, sir. The doctor, sir, says as it ain't safe to take it away yet." A curtain interposed between the head of the patient and the light of the window. This Jen drew aside, and lightly removed the outside wrappings of the wound. The housemaid looked on in horror, for she did not dare to prevent her master from meddling, yet she felt sure that he was doing wrong. But Jen was bent on making the discovery as to whom the handkerchief belonged; and in a few minutes he had the outside bandages removed, and saw the handkerchief discolored with dry blood lying over the wound. With deft fingers he lightly touched the four corners. In one of them were the initials "M. D." "M. D.!" said the major to himself. "Margaret Dallas, the mother of Isabella. How did her handkerchief come into the room on that night? And the perfume?" It struck his sense of smell with the belief that he had smelt it before. Nothing is so strong to awaken memory as odor, and in less than half a minute the mind of the major leaped back to where he had smelt it before. It was the perfume of the dried poison of the devil-stick. CHAPTER XIII. ISABELLA. This discovery at once irritated, amazed and perplexed the major. That the handkerchief of Mrs. Dallas should be bound around the head of Jaggard was strange, but that it should be perfumed with the deadly scent which impregnated the devil-stick was stranger still. Had Mrs. Dallas found the wand of sleep? Had Mrs. Dallas perfumed the handkerchief with its cruel poison? Had Mrs. Dallas drugged or stupefied Jaggard on that fatal night by means of that saturated handkerchief? These were the vital questions which presented themselves to the puzzled major, and which he found himself unable to answer.