“Well, it must be something important to take Dave away from here at just this time,” commented Elmer.

The young aviator reappeared about two hours later. The chauffeur who had come for him brought him back. Dave came into the living tent all briskness and cheery as usual. The watchful Hiram, however, whispered cautiously to Elmer that “he acted as if he had something heavy on his mind.”

The boys made frequent visits to the Comet during the evening. Hiram noticed that Dave seemed very solicitous that a double watch should be kept over the machine during the night. He hired two extra men to spell the regular watchmen, and gave them close directions as to their care of the biplane.

A band of music woke up the three young airmen early in the morning. It announced a reception to some French experts who had arrived to take part in the international flights. Dave was out of bed first, as usual, and bolted out of the place, anxious to see if all was well with the Comet.

Hiram and Elmer began to dress. They felt buoyant and eager for the work of the day. In sport, as Elmer finished dressing first, he made a grab for the pillow on the cot Dave had occupied and sent it hurtling at the head of his companion.

“That’s the last pillow you’ll see for a long time to come,” he announced. “Hello! Why, Hiram, look here!”

The speaker stood stock still, gazing spellbound at the head of the cot whence he had taken the pillow. Hiram, joining him, looked down like himself in sheer, startled wonder.

CHAPTER IX

THE PATH OF THE EAGLE

“Well, I declare!” almost shouted Hiram Dobbs.