Up he mounted and presently saw Buck Bangs engaged with a rather clumsy German, who seemed bent upon peppering Bangs and his machine full of holes. He flew to Buck's assistance, when the German straightened out and made for his own rear, with Bangs in full pursuit. In his present mood, instead of returning with the rest of the home squadron, Blaine took after the German, and for five minutes there was a mid-heaven race towards Belgium. But Bangs, in his small scout, was easily the fastest and soon he and the German were engaged in a running duel. All at once Buck signaled to Blaine in code: "Leave this Boche to me. There's a train off eastward. See if you can't do something. Get up higher: you'll see better." Mutely Blaine obeyed and, as he rose up another thousand feet, he saw more than one row of cars, upon a single track hurrying towards the front, whence already the distant bellow of earthly struggles was going on. Evidently the big Allied offensive was on. If he, Blaine, could hinder the troop trains from reaching the front trenches, it might be a big help to the infantry, that was now attempting its part of the big stunt. Straightway the biplane, with the body of Stanley still nestling in the bottom of the observer's, manhole, was shooting downward in a gradual slant towards the two trains. One of these was filled with soldiers, at least a brigade, for the train was a long one. The one ahead seemed to be loaded with munitions and with artillery on the rear cars. Swooping down closer, Blaine laid his plan. When within three hundred feet he saw some Archies posted at a crossroads who at once began firing. In his present mood he would have cared little for any obstacle as yet untried. Above the noise of his propellers he detected something behind, and, turning, what was his amazement to see Stanley's ashen gray face peering up over the observer's seat. Blaine was startled, as if he looked at a ghost. "Get down, boy!" he adjured. "You ain't strong enough. Get down! I've got a stiff job just ahead. Give me time and room." Whether Stanley understood or not Blaine was not certain. But just then the stricken man crumpled back again into his former nest at the bottom of the manhole. A slow groan came up. "Poor chap! He's in misery, no doubt. But I've just got to try this job --" Just then the Archies began to cut loose, but Blaine went to zigzagging, at the same time increasing his speed, swooping still lower -- lower. At last directly over the front train, with machine guns, Archies, and rifles peppering away at him, he let go with one side of his bomb rack. With the sound of the resultant explosion he wheeled and let go the other. Both racks landed directly upon the leading train loaded, as Blaine suspected, with all sorts of ammunition.