When he drew out from under the lee of the hills he found that the wind was in his favour, blowing directly down the Narrows. This should mean at least a three-knot current. The launch was small, and probably incapable of more than seven or eight knots: his utmost speed, then, might rise to ten or eleven. But it was not wholly a question of speed. If the alarm was given before he reached the narrowest part of the channel at Chanak escape would be unlikely if not impossible. The fast-gathering darkness would be no protection. He would be under searchlights from both sides, and a dozen batteries would have him under fire at ranges ascertained to a yard. His nerves, judgment, quickness of decision, would be taxed to the uttermost in this adventurous voyage of a few miles.

With the fall of night navigation practically ceased on the strait; therefore he was not very likely to be run down by accident. But he must guard against collision with vessels moored under either shore. Further, there was always a chance that he would be challenged from the deck of one of the stationary vessels, and though he did not doubt his ability to give a reassuring answer, he had always the Kurd to reckon with. It would have been prudent to gag him, but the opportunity for that was past. Shaping his course by the faint twilight, he kept one eye on Abdi, ready to take action instantly if the man showed any disposition to be troublesome.

So, in growing darkness, he ran down the strait until he came opposite Chanak, which was distinguishable by a few dim lights and the sounds of bustle on the quays and jetties. The place had suffered considerably by bombardment from the ships of the allied fleet, which had come up to within a few miles of the Narrows; but it was clear that extensive repairs were already in progress. Observing two or three large vessels moored out of the current in the little bay north of the town, Frank as a measure of precaution cut off the engine, and the launch drifted into the neck between Chanak and Kilid Bahr. His ear caught the faint sound of a windlass working in the channel at some unseen point ahead. Clearly a vessel lay out there. He pitched his voice to a low note, and gave Abdi a quiet warning not to speak a word or make any movement of alarm, on pain of receiving the full contents of his revolver. The most dangerous part of his voyage was evidently at hand.

In a few minutes he saw, some little distance ahead on the starboard side, a large dark shape moving towards him. Putting the helm over, he crept in more closely to the Asiatic shore, in the hope that the launch, being small and low and travelling silently, would escape observation. But next moment he was startled by the sudden beam of a searchlight playing over the middle of the channel from some point behind him. The darkness on either side was intensified, so that the light, while it swept mid-channel, favoured him; but if it should bend its rays to the left, the launch would be vividly illuminated, and could not fail to be observed by the men on the approaching vessel, who would certainly follow with their eyes the path of light. He watched the beam lengthening its giant stride. It passed over the slowly approaching torpedo boat and illuminated the water beyond. Hugging the shore as closely as he dared, Frank drifted on, resolved, if the light fell on him, to start the engine and make a dash at full speed down the strait.

The light took a sudden sweep upwards, swung to the right over the hills and disappeared. Then Frank realised that the current had failed him. The launch was scarcely moving. He steered for the open channel, edging out very gradually. No sooner had the launch come again into the current than the light flashed out, just touching a point of land on his port side, and passing beyond it. It occurred to him that if he could round the point during the interval of darkness before the light again appeared, he would no longer be in its direct path. It was worth the risk of starting the engine and making a dash over the short distance between him and safety. Guided only by the dark outline of the low wooded cliffs on his left hand, he put the engine at full speed while the light was still sweeping the channel. To maintain an even distance from the shore he soon found it necessary to keep the helm well over. He must be rounding the point. And when, a minute or two later, the beam once more flashed out, it passed almost directly over him, leaving him in shadow. With a sense of profound relief he stopped the engine and floated down with the current, more than satisfied for the moment, but wondering how long his luck would hold.

The launch was now in pitch darkness. Frank knew that there were shoals along the shore, and he was beset by a double anxiety: he must steer so as to avoid at once the path of the searchlight and the unknown shoals. So fully was his attention occupied that he had almost forgotten the Kurd lying forward. The dark patch which favoured him was favourable also to an expedient which Abdi had been grimly meditating. Suddenly, while Frank was peering into the darkness ahead, he was conscious that a black shape had intervened between him and the scarcely perceptible space of water. He knew instantly what it was, but before he could brace himself for the impending shock the steering-wheel shivered under a sword-cut that missed him by a hairsbreadth, and the Kurd flung himself upon him, at the same time shouting vociferously to attract the attention of any watchers who might be on shore, or on some vessel near by. Taking advantage of Frank's preoccupation and the darkness, Abdi had crawled from under the awning and along the deck under the side of the little craft, springing to his feet within a few inches of Frank's seat.

It was the fact of being seated that proved to be Frank's salvation. Abdi lost the advantage of surprise when his sword-cut missed. He fell forward awkwardly. Frank's right hand was pinned beneath the Kurd's body, but his left, with which he had held the wheel, was free. Instantly he gripped Abdi's sword-arm above the wrist, and for a few moments there was a fierce struggle for position between the two men; Frank striving to free his right hand, and when he had done so, to prevent the Kurd from strangling him with his left arm.

Frank was soon aware that in mere power of muscle he was no match for his assailant. But he had the firmer position, Abdi being inclined forward and swaying unsteadily with the rocking of the launch. Suddenly dropping his clutch on the Kurd's upper right arm, he seized him by the throat, braced himself against the seat, and pulled his left arm towards him, exerting all his strength to twist him over. With his free right hand Abdi clutched at the thwart; but Frank's leverage against the seat gave him the mechanical advantage; moreover, the Kurd was expending much energy in trying to free himself from the pressure on his windpipe. Inch by inch he was pressed back against the side of the launch, every moment struggling more feebly under Frank's choking clutch. At last his shoulders were hanging over the water, and his arms were raised as a drowning man throws up his hands. Then suddenly Frank released the Kurd's throat, caught him beneath the right knee, and, pressing heavily on the seat, tilted him overboard. There was a gurgling gasp as the man struck the water, then a brief silence, broken soon by a long yell. It was a cry for help, but not a cry of despair, and Frank, panting from his recent exertions, was aware that Abdi could swim. His cries must be heard on shore and on any vessels that might lie in the neighbourhood or be patrolling the strait. At first their meaning would not be known, but they would give the alarm and put the enemy on the alert, and as soon as Abdi reached the shore the truth would be flashed from fort to fort.

The launch, left to itself during the struggle, had drifted inshore and was bumping against the rocks. Frank had just switched on the engine and reversed the screw when an agitated movement of the searchlight and shouts from the cliffs above him showed that an alarm of some sort had been given. The white beam was sweeping the whole breadth of the channel except that black band which was shielded by the cliffs and in which the launch was moving. This band widened as the trend of the shore became more south-westerly, and Frank had good hope of running out of danger. His confidence was rudely shaken when a second searchlight began to play from a point slightly ahead of him. For all he knew there might be others at different points down the channel. It was neck or nothing now. He put the engine at full speed ahead, and the launch throbbed and swished through the water.

The coast-line here made a sudden bend inwards. Frank steered accordingly, and was relieved to find that by his change of course he just escaped the searchlight, whose beam flashed almost over his head. The beating of his screw could hardly fail to be heard on shore, no more than a hundred yards away; but the light could evidently not be depressed sufficiently to illuminate this edge of the channel. The launch dashed on; the light was left behind; and steering almost due south Frank once more felt secure.