The envelope was an ordinary white one, merely sealed with a solution of gum arabic, and dexterous fingers could easily open and reclose it without fear of detection, especially by eyes so dim and uncertain as those for which it had been addressed. A damp cloth laid upon the letter would in five minutes prove an _open sesame_ to its coveted contents, and a legion of fiends patted the girl's tingling fingers and urged her to this prompt and feasible relief from her goading impatience. Secure from intrusion and beyond the possibility of discovery, she turned the envelope up and down and over, examining the seal; and the amber gleams lying _perdu_ under the shadows of her pupils rayed out, glowing with a baleful Lucifer light, as infallibly indicative of evil purposes as the sudden kindling in a crouching cat's or cougar's gaze, just as they spring upon their prey. It was a mighty temptation, cunningly devised and opportunely presented, and six months ago her parley with the imps of Apollyon who contrived it would not have lasted five minutes; but, in some natures, love for a human being will work marvels which neither the fear of God, nor the hope of heaven, nor yet the promptings of self-respect have power to accomplish. Now while Salome dallied with the temper and gave audience to the clamors of her rebellious heart, she looked up and met the earnest gaze of a pair of sunny blue eyes in a picture that hung directly opposite. It was an admirable portrait of Dr. Grey, clad in full uniform as surgeon in the U.S. Navy, and painted when he was twenty-eight years old. Up at that calm, cloudless countenance, the girl looked breathlessly, spell-bound as if in the presence of a reproving angel; and, after some seconds had elapsed, she hurled the unopened letter across the room, and lifted her hands appealingly,--