The brief note written by the aviator whom they had aided—might not that be of benefit to their cause?

It will be remembered that Thad had taken pains to conceal this under the lining of his campaign hat, lest some Belgian eye read what the Taube birdman had written over his signature, and charge them with being German spies.

Taking off his hat he fumbled under the lining, and quickly produced the paper, a bit crumpled, and lacking freshness, but with the penciled writing plainly legible, which was all Thad cared about.

When he looked up he saw that many eyes had been following his motions, as if the Uhlans had had their curiosity aroused.

“There is one incident connected with our trip through this part of Belgium, sir, that I would like to speak of, hoping it will convince you we are what we claim to be, only that and nothing more. Have I your permission to tell you about this adventure, sir?”

“Proceed,” the officer told him; “we are giving the horses a little rest, which they sorely need, so a short delay will do no harm.”

“We were coming along when we had an accident to the engine. While I was making the necessary repairs one of my friends made an astonishing discovery. We saw the figure of a man caught in the top of a tall tree. He was moving his arm to us as if he hoped to attract our attention in that way. When we hurried up to the tree we found, just as we expected, the wreck of an aeroplane there!”

Thad purposely paused at that thrilling point so as to let them grasp the full force of his assertion. He was not much surprised when the officer demanded:

“Could you tell from the build of the aeroplane what sort of a machine it may have been, boy?”

“Yes, for I had noticed them while over in Germany, sir,” replied Thad. “It was a Taube model. We climbed the tree at once, three of us, and after some hard work managed to get the aviator safely down. He told us how he had been scouting over the Belgian lines when both his machine and himself were struck by shots. He tried to sail slowly to the ground miles away from the fighting line, but by hard luck struck that tree, and became caught there, his machine falling to the earth.”