"Oh, I know that!" cried Harry eagerly. "The nurse didn't need a thermometer, because if the water was too hot the baby turned red and if it was too cold he turned blue. Is that the answer?"

"Right you are!" declared Ned, laughing. "So we'll try the clothes on, and if they're right they'll fit, and if they're not right, why—"

"Why," interrupted Jack, "if they're not right we should worry."

"Yes, I guess that's about it," answered Ned as he picked up an outfit that he assumed to be the right size.

The boys found little difficulty in getting clothing of suitable sizes, and soon stood forth arrayed in German uniforms.

"Now, then, let's see what the chances of escape may be," said Ned.

A trial of the one small window showed that it was not locked. There appeared to be no one outside guarding the exit, and, since the noises in the outer room had ceased, the lads determined to leave by the window. In a short time they again stood outside the house.

To make their way back to the field where the Eagle had been left was a short task and quickly accomplished. There they found, to their astonishment, that the two aeroplanes remained in the same position and were apparently unguarded.

This time, however, the lads were more cautious in their approach, and reconnoitered the vicinity thoroughly before approaching the plane.

Ned set to work immediately and soon announced that he had again connected the severed wires. In another moment the Eagle rose above the field into the darkness of the night.