“I sincerely trust you will prevail on him to accept my offer,” spoke the pretended army man. “I shall feel that my duty to the admiralty and war office has been remiss if I fail to secure your valuable services. I am aware of your opposition to leaving your native country. I also appreciate your wish to remain neutral in regard to any actual warfare. That can be arranged. What we ask of you is to act as an instructor. Please think it over,” and he turned aside.

“Now, then,” broke out Hiram promptly as the lieutenant sauntered away, “what is that fellow really after, Dave?”

“Why, Hiram, according to his own story he is a representative from the aviation department of the British war office. He has made a very creditable showing—and he offers me all expenses paid abroad, where he says a yearly contract of several thousand dollars will be offered.”

“I don’t like him. Why, say, he reminds me of one of the funny cartoons that new tramp friend of yours drew for us last evening.”

“Hello!” exclaimed Dave, glancing hastily at his watch and then at the hangar. “He’s some sleeper; isn’t he, that tramp?”

The young airman referred to a new character who had incidentally come across their path the day previous. He was a tramp, a little above the average, but still frowsy, hungry and penniless. His humor had made an impression on the boys. They had fed him and he had asked for work to repay them. He was sober, and he looked honest, Dave had consented to his sleeping in the hangar.

“I guess it’s the first comfortable bed the poor fellow has had for a long time,” explained Hiram. “Say, Dave, he must have been a good artist once, to draw those faces as cleverly as he did last evening.”

“Yes, he certainly has a sort of genius about him,” began Dave, when there was a sudden and startling interruption.

From Dave’s hangar there came a dull explosion. Both of the young aviators made a rush in its direction, wondering what accident had happened.