To face p. 206] That this explosion should have happened at this moment was a misfortune of the greatest magnitude, for it spoilt the whole tactics. Captain Campbell was watching the enemy closely, and the latter was coming on so nicely that he had only to proceed a little further and _Dunraven’s_ guns would have been bearing at a range of not more than 400 yards. As it was, the explosion gave the whole game away, for firstly it frightened the submarine so that he dived, secondly it set going the ‘open fire’ buzzers at the guns. Thus the time had come to attack. The only gun in the ship that would bear was the one on the after bridge, and this began to bark just as the White Ensign was hoisted. One shot was thought to have succeeded in hitting the conning-tower just as the enemy was submerging, but if he was damaged it was not seriously, and Captain Campbell realized that the next thing to expect was a torpedo. He therefore ordered the doctor to remove all the wounded, and hoses were turned on to the poop, which was now one mass of flames, the deck being red-hot. So gallant had been this well-disciplined crew that even when it was so hot that they had to lift the boxes of cordite from off the deck the men still had remained at their posts.[6] The position now was this: a ship seriously on fire, the magazine still intact but likely to explode before long with terrible effects, a torpedo attack imminent, and the White Ensign showing that this was a ‘trap-ship’ after all. The submarine would certainly fight now like the expert duellist, and it would be a fight to the finish, undoubtedly. Realizing all this, and full well knowing what was inevitable, Captain Campbell made a decision which could have been made only by a man of consummate moral courage. To a man-of-war who had answered his call for assistance when the explosion occurred he now sent a wireless signal requesting him to keep away, as he was already preparing for the next phase, still concentrating as he was on sinking the submarine.[7] [Illustration: FIG. 15.—THE GREAT DECISION. Captain Campbell’s famous wireless signal refusing assistance when the Q-ship _Dunraven_ was already crippled and about to be attacked again.] [Illustration: Q-SHIP “DUNRAVEN” Her duel with the submarine being ended, the crippled “Dunraven” is taken in tow by H.M. Destroyer “Christopher,” who is seen endeavouring to get her into port. To face p. 208]