Under the shadow of the boat he drew a little nearer to the door of the cabin. There was absolute silence within. What they were doing he could not imagine, but the place was in absolute darkness. Thoroughly awake now he crouched within a few feet of the door listening intently. Once he fancied that he could hear a voice, it seemed to him that a hand was groping along the wall for the knob of the electric light. Then the door was softly opened and the woman came out. She stood for a moment leaning a little forward, listening intently ready to make her retreat immediately she was assured that the coast was clear! She was a little pale, but in a stray gleam of moonlight Mr. Sabin fancied that he caught a glimpse of a smile upon her parted lips. There was a whisper from behind her shoulder; she answered in a German monosyllable. Then, apparently satisfied that she was unobserved, she stepped out, and, flitting round the funnel, disappeared down the gangway. Mr. Sabin made no attempt to stop her or to disclose his presence. His fingers had closed now upon his revolver--he was waiting for the man. The minutes crept on--nothing happened. Then a hand softly closed the window looking out upon the deck, immediately afterwards the door was pushed open and Mr. Watson, with a handkerchief to his mouth, stepped out. He stood perfectly still listening for a moment. Then he was on the point of stealing away, when a hand fell suddenly upon his shoulder. He was face to face with Mr. Sabin. He started back with a slight but vehement guttural interjection. His hand stole down towards his pocket, but the shining argument in Mr. Sabin's hand was irresistible. "Step back into that room, Mr. Watson; I want to speak to you." He hesitated. Mr. Sabin reaching across him opened the door of the cabin. Immediately they were assailed with the fumes of a strange, sickly odour! Mr. Sabin laughed softly, but a little bitterly. "A very old-fashioned device," he murmured. "I gave you credit for more ingenuity, my friend. Come, I have opened the window and the door you see! Let us step inside. There will be sufficient fresh air." Mr. Watson was evidently disinclined to make the effort. He glanced covertly up the deck, and seemed to be preparing himself for a rush. Again that little argument of steel and the grim look on Mr. Sabin's face prevailed. They both crossed the threshold. The odour, though powerful, was almost nullified by the rushing of the salt wind through the open window and door which Mr. Sabin had fixed open with a catch. Reaching out his hand he pulled down a little brass hook--the room was immediately lit with the soft glare of the electric light. Mr. Sabin, having assured himself that his companion's revolver was safely bestowed in his hip pocket and could not be reached without warning, glanced carefully around his cabin.