These two vigorous young fellows were fair samples of those enterprising Americans who found it impossible to sit idly by. They could not await the slow course of events that was bound to carry our country into the world war on the side of the Allies, in spite of all the powerful counter currents among the pro-German citizens at home.

Dozens of the brightest of flying men from the States had gone over and offered their services to France, the country they loved. In time there came to be so many, that from the ordinary French Flying Corps there was formed a unit entirely made up of Americans.

This, in honor of the one great Frenchman whom Americans most honor at home, was called the Lafayette Escadrille. Some of its members had become famous at their profession. Names like those of Lufbery, Thaw, McConnell, Chapman, Prince, Rockwell, Hill, Rumsey, Johnson, Balsley and others became household words among readers of the great dailies in the States.

Tom Raymond was the son of a man who had gained fame as an inventor. When the war broke out he started work on numerous inventions, some of which were calculated to become terrible agents for the destruction of human life. Then Mr. Raymond's mood changed, and he set to work to conceive a wonderful stabilizer for airplane use that would save myriads of lives, and if adopted by Uncle Sam was likely to help win the war for the Allies.

Just when this invention was finished a drawing of one of the parts was stolen by a German spy. Later on, after Tom and his chum, Jack Parmly had decided to become war aviators, having already had considerable aviation experience, they went to the flying school conducted by the Government in Virginia.

From there in course of time they crossed the Atlantic and entered the famous French school at Pau. Then, having mastered the science of flying sufficiently to be sent to the front, they had joined the Lafayette Escadrille, as related in a previous volume entitled "Air Service Boys Flying for France; or The Young Heroes of the Lafayette Escadrille."

Tom in particular seemed to have a great career ahead of him, unless some unfortunate accident, or possibly a Teuton pilot, cut it short, as had happened in the cases of Rockwell, Prince, McConnell and Chapman. Every one knew he possessed genius of a high order, and that it would not be long before Tom Raymond might anticipate gaining the proud title of "ace," which would indicate that he had defeated five enemies at different times, and put them entirely out of the running.

Tom was already a corporal in the French service, and expected before a great while to be given the privilege of wearing the chevrons of a sergeant. Jack had not progressed so rapidly but was doing well.

And now to return to the young aviators during their walk.

"I reckon we've gone far enough, Jack," Tom remarked presently. "Our friend Jean may have been telling the truth when he said there were still a few bunnies left alive in this war-racked section of country, but I can see they've got the good sense to stick to their burrows during the daytime. We won't be burdened with our bag of game on the return trip."