"And making time, too," remarked Innis.

Aircraft were no novelties to the cadets. In fact part of the instruction at Kentfield included wireless, and the theoretical use of aeroplanes in war. The cadets had gone in a body to several aviation meets, and once had been taken by Major Franklin Webster, the instructor in military tactics, to an army meet where several new forms of biplanes and monoplanes had been tried out, to see which should be given official recognition.

"I never saw one like that before," remarked Paul, as they watched the evolutions of the craft above them.

"Neither did I," admitted Dick.

"I've seen one something like that," spoke Innis.

"Where?" his chums wanted to know, as Dick slowed down his boat, the better to watch the biplane, which was now circling over the river.

"Why, a cousin of mine, Whitfield Vardon by name, has the airship craze pretty bad," resumed Innis. "He has an idea he can make one that will maintain its equilibrium no matter how the wind blows or what happens. But, poor fellow, he's spent all his money on experiments and he hasn't succeeded. The last I heard, he was about down and out, poor chap. He showed me a model of his machine once, and it looked a lot like this. But this one seems to work, and his didn't—at least when I saw it."

"It's mighty interesting to watch, all right," spoke Paul, "but we'll be in for a wigging if we miss guard-mount. Better speed her along, Dick."

"Yes, I guess so. But we've got time—"

Dick never finished that sentence. Innis interrupted him with a cry of: