He was right, and presently they all heard the faint but penetrating whirr of an aeroplane’s engines, even above the louder and deeper note of the cannonade and rifle fire. “There she is,” said Larry. “Can you see the marks on her?” “It’s ours,” said Kentucky. “I see the rings plain enough.” Although the aeroplane was at a good height, there were several who could distinguish the bull’s-eye target pattern of the red, white and blue circles painted on the wings and marking the aeroplane as British. For some time it pursued a course roughly parallel to the line of the trench, so that the Stonewalls, craning their heads back, could follow its progress along the sky, and the trailing wake of puffing smoke from the shrapnel that followed it. They lost sight of it presently until it curved back into the range of their vision, and came sailing swiftly over them again. Then another ’plane shot into view above them, steering straight for the first, and with a buzz of excited comment the Stonewalls proclaimed it a Hun and speculated keenly on the chances of a “scrap.” There was a “scrap,” and in its opening phases the Stonewalls had an excellent view of the two machines circling, swooping, soaring, and diving in graceful, bird-like curves. The “Archies” ceased on both sides to fling their shrapnel at the airy opponents, because with their swift dartings to and fro, and still more because of their proximity to one another, the Archie gunners were just as liable to wing their own ’plane and bring it down, as they were to hit the enemy one. For two or three minutes the Stonewalls watched with the wildest excitement and keenest interest the maneuvering of the two machines. Half a dozen times a gasp or a groan, or a chorus of comment “He’s hit,” and “He’s downed,” and “He’s got him,” followed some movement, some daring plunge or nose dive of one or other of the machines; but always before the exclamations had finished the supposed injured one had righted itself, swooped and soared upward again, and swung circling into its opponent. Once or twice the watchers thought they could catch the faint far-off rattle of the aeroplanes’ machine guns, although amongst the other sounds of battle it was difficult to say with any certainty that these shots were fired in the air; but just when the interest and excitement were at their highest, a sharp order was passed along the trench for every man to keep his face down, on no account to look upwards out of the trench, and officers and sergeants, very reluctantly setting the good example by stooping their own heads, pushed along the trench to see that the men also obeyed the order. “Blinkin’ sell, I calls it,” exclaimed Pug disgustedly. “The fust decent scrap between two ’planes I’ve ever ’ad a chance to see, and ’ere I’m not allowed to look at it.”