"That makes six machines after them," said Alfred. "But what is that over there?" continued Alfred, as he pointed to the south. "Look at them, Ralph! Are they our machines?" "Yes! yes! four, five, six, eight; some of them Sopwiths; now there'll be some fun," cried Ralph enthusiastically. "They'll be there in ten minutes," said Alfred. "They are going up, up; that was Lieutenant's favorite trick; they are doing that to frighten the German aeroplanes away from Captain Winston." "And it's succeeding, too," replied Ralph. "One of the machines is coming this way; no, it's not the lieutenant, so it must be Captain Winston." "Order the men to stand at attention," shouted the commandant. "Are they all ready?" he asked after a moment. "They are ready for the order." "The captain has just signaled with two puffs." "Trial range!" ordered the commandant. "Boom! boom!" replied two of the monsters in reply. The machine turned, and speeded away toward the hill beyond. "Where are the German ships now?" asked the commandant. "Nowhere in sight," replied Ralph. "The other machine must be coming this way," sang out Alfred. "Three puffs to the right, followed by another one." "One degree to the right!" observed the chief gunner. This order was imparted to the gun crews. Thus the battle continued for two hours, while the great guns on the hill searched every nook and corner, if there was one, in the depression toward which the arrow on the bench mark pointed. The machines were returning. It would be impossible for the aviators and observers to continue the arduous duty for a much greater length of time, and as the guns were landing the great shells within the area which it was intended to search out, the new duty would call them the next day. The guns didn't cease to roar until late that evening. Three great motor vans were constantly moving up and down the hill, bringing the immense shells, and it was a fascinating game to see the manner in which they were handled after they left the vans. Directly behind the row of guns was a narrow-gauge railway, with a return switch, or siding. Two metal trucks were employed, each truck having a rack which carried six shells which were loaded crosswise. Below the rack was a sort of box, also of metal. Behind each gun was a track, which led to the main railway, and on this short branch was a truck adapted to hold a single shell. [Illustration: _Arrangement of Guns on Hill 203_] A stationary rack was alongside of the track adjacent the branch track, capable of holding three shells, so that this rack would temporarily hold the shells as they were unloaded from the carrying truck. As the truck on the main line unloaded its freight, the assistants would throw the cartridge, or the rear part of a fired shell, into the box beneath the racks, and it was thus conveyed back to the vans. The latter would be loaded and conveyed down the hill to be transported back to the munition factories.