He had resumed his work and was leaning far over the bow intent upon his labour. Suddenly she spun the wheel round and the launch heeled over to starboard. For a second it seemed that Marcus Stepney could not maintain his balance against that unexpected impetus, but by a superhuman effort he kicked himself back to safety, and stared at her with a blanched face. "Why did you do that?" he asked hoarsely. "You nearly had me overboard." "There was a porpoise lying on the surface of the sea, asleep, I think," she said quietly. "I'm very sorry, Marcus, but I didn't know that it would throw you off your balance." He looked round for the sleeping fish but it had disappeared. "You told me to avoid them, you know," she said apologetically. "Did I really put you in any danger?" He licked his dry lips, picked up the paint-pot, and threw it into the sea. "We'll leave this," he said, "until we are beached. You gave me a scare, Jean." "I'm dreadfully sorry. Come here, and sit by me." She moved to allow him room, and he sat down by her, taking the wheel from her hand. On the horizon the high lands of northern Africa were showing their saw-edge outlines. "That is Morocco," he pointed out to her. "I propose giving Gibraltar a wide berth, and following the coast line to Tangier." "Tangier wouldn't be a bad place to land if there weren't two of us," he went on. "It is our being together in this yacht that is likely to cause suspicion. You could easily pretend that you'd come over from Gibraltar, and the port authorities there are pretty slack." "Or if we could land on the coast," he suggested. "There's a good landing, and we could follow the beach down, and turn up in Tangier in the morning--all sorts of oddments turn up in Tangier without exciting suspicion." She was looking out over the sea with a queer expression in her face. "Morocco!" she said softly. "Morocco--I hadn't thought of that!" They had a fright soon after. A grey shape came racing out of the darkening east, and Stepney put his helm over as the destroyer smashed past on her way to Gibraltar. He watched the stern light disappearing, then it suddenly turned and presented its side to them. "They're looking for us," said Marcus. The darkness had come down, and he headed straight for the east. There was no question that the destroyer was on an errand of discovery. A white beam of light shot out from her decks, and began to feel along the sea. And then when they thought it had missed them, it dropped on the boat and held. A second later it missed them and began a search. Presently it lit the little boat, and it did something more--it revealed a thickening of the atmosphere. They were running into a sea fog, one of those thin white fogs that come down in the Mediterranean on windless days. The blinding glare of the searchlight blurred. "_Bang!_" "That's the gun to signal us to stop," said Marcus between his teeth.