Presently the strain on the hawser increased. It was only by making full use of the twin-screws that the trawlers were able to prevent themselves from swinging together. The steel rope stretched until it resembled two metal bars which bore silent testimony to the strain.
Just then the two vessels shot ahead. Although the hawser was still intact, it no longer took any strain. But its work was done. The bight, engaging the conning-tower of the unterseeboot, had turned the submarine on its side. In the space of a few seconds the deadly fumes from the capsized batteries had almost painlessly accounted for the crew of the U-boat, who themselves had neither pity nor consideration for the hapless victims, men, women, and children, massacred against all dictates of humanity and convention of civilized warfare.
"A bit of work for the dockyard lighters to-morrow," commented Sub-lieutenant Barry, as the Capella parted company to resume her run up-Channel. "They'll raise the U-boat, and take her into dry dock, before the sulphuric acid has had time to do much damage to her mechanism."
"I shouldn't be surprised if there were another U-boat knocking around," remarked Vernon. "From our limited experience we know that they work either in pairs or threes."
"Then the worse for them," rejoined Barry. "It would be a great wheeze to bag two of them in one day. Desperate diseases need desperate remedies, you know."
Therein the Sub voiced the unanimous opinion of the British Navy. At the commencement of the war, the torpedoing of several battleships and cruisers by German submarines aroused no enmity within the hearts of the British tars. They realized that a warship is "fair sport" to the submarines of the opposing side. To run the risk of being blown up was one of the excitements to undergo in the course of duty. But when it came to torpedoing helpless merchantmen, and jeering at the death-struggles of the unfortunate crews, Jack Tar began to regard the unterseebooten in the light of pirates and murderers. The wanton destruction of the Lusitania, accompanied by the appalling death-roll of non-combatants, women and children, literally sounded the death-knell of the crews of von Tirpitz's jolly-Roger-flying submarines. In their methods of "frightfulness" they had overreached themselves. They had sown a wind: they were now reaping a whirlwind with a vengeance.
And now the great silent Navy was paying back von Tirpitz in almost, but not quite, his own coin. While the much-advertised blockade of Great Britain was petering out, British submarines were playing havoc with German shipping in the Baltic—a sea which the Teutons regarded as being almost their very own. Yet what a difference marked the methods adopted by the humane commanders of our submarines when dealing with German mercantile shipping. A punctilious regard for the safety of the crews of overhauled merchantmen won admiration even from the seamen of the destroyed vessels. Humiliation and reproach seemed to haunt the white-bearded dotard, whose hands had sought in vain to wrest the trident from Britannia's virile grasp.
At about five in the afternoon the Capella arrived at her station off Beachy Head, relieving her sister ship the Markab, that, with three other motor-driven craft, had been engaged in a vigorous, but for the most part uneventful, patrol.
Day and night for a fortnight at a stretch, unless anything unforeseen took place, the Capella was to cruise up and down, keeping a smart look-out for any sign of an object resembling a hostile periscope. In order to economize her fuel supply her speed was reduced to 10 knots. It was then that her bad qualities showed themselves. With her shallow draught and high freeboard she rolled like a barrel, since speed was essential to impart steadiness. The motion was certainly disconcerting, although it did not imply that the Capella was unseaworthy.
"'Fraid our chances of bagging another U-boat to-day are off," remarked Barry to Ross.
It was within half an hour of sunset. The chums had been temporarily separated. It was Vernon's "watch below". The senior Sub and young Trefusis were on the bridge. In spite of the still-prevailing east wind it was a grand evening. Three miles away, broad on the starboard beam, the chalk cliffs known as the Seven Sisters were beginning to be tinted by the crimson hues of the western sky. To seaward, three large vessels were in sight. One, a liner bound down-Channel, was pelting along at such a pace with the wind that the smoke from her funnels was rising almost perpendicularly. Forging ahead in the opposite direction were two big tramps, the smoke from their funnels, beaten down by the strong breeze, trailing across the surface of the water for a couple of miles in their wake.
"An object lesson," remarked Barry. "The arteries of the Empire. Hang it all! The blockade reminds me of a pigmy treacherously stealing up behind a giant and trying to cut his jugular vein. Instead, he merely scratched a comparatively unimportant capillary, and feels mighty sorry for himself when the giant turns and scruffs him by the neck."
Leaning over the bridge-rails, the Sub startled his companion by bellowing in a voice loud enough to be heard a mile away:
"On look-outs! Stand by bow and stern lights!"
The Capella was making preparations for the night. Unlike the armed merchantmen that are compelled to scour the North Sea, summer and winter alike, without showing the faintest glimmer of a lamp, the Capella observed the rules and regulations for preventing collision at sea. Her port, starboard, and bow lamps were lighted by electricity, but, in order to guard against possible break-down of current, oil lamps had also to be trimmed and lighted, ready, should occasion serve, to take their places.
It was part of Ross's duty to report to the officer of the watch that these lamps were in order, and also, at regular intervals, that the navigation lights were burning brightly.
Presently the Sub prepared to take a cross-bearing. He was fairly certain that the Capella had reached the westernmost limit of her patrol-ground. From that point she was to proceed due south for 10 sea miles, and then due east for 20 miles until she fell in with her "opposite number".
While Barry was thus engaged, Ross noticed a sail about 2 miles distant on the starboard quarter.
"By Jove!" he muttered as he brought his glass to bear upon the stranger. "That's a funny rig."
The craft was a "two-sticker". She was square-rigged on the foremast, carrying fore-topsail and fore-course. No jibs were set; neither, as far as he could see, was any sail set on the mainmast. The vessel's sides were painted green with a broad red band.
Even as he kept the craft under observation she starboarded her helm, shaping a course that would converge upon that of the rearmost of the two tramps. By so doing she exposed a considerable portion of her broadside.
Ross gave an exclamation of astonishment. Above the green sides appeared what was undoubtedly the conning-tower and housed periscope of a submarine. "Submarine on the starboard quarter, sir!" he reported.
"What!" exclaimed Barry, levelling his telescope. "By Jove, yes! What luck!"
The unterseeboot had, of course, noticed the Capella, and had mistaken her for a trawler. She realized that she ran a risk in case the latter might be armed, but, trusting to her disguise, she hoped to get within torpedo range of the tramp—a vessel of over 3000 tons—sink her, and make her escape in the confusion that was bound to ensue. On the other hand, her Kapitan had good reasons for thinking that the supposed trawler was not one of the armed patrol, since they usually worked in company. By rigging canvas bulwarks and setting sail upon dummy masts, he was able to approach with little fear of detection.
"Action!"
Quickly the Capella's crew were at their stations. The quick-firers were loaded, and their screens lowered so as not to impede their arc of fire. Until these preparations were complete the vessel still held on her course.