Then the three returned to the villa. Others of the members of the escadrille were in the car with the trio, so the talk was general, experiences of the day's happenings being narrated, all told in a careless fashion, as if those young aviators considered all such risks as part of the ordinary routine of business.

Later on the news concerning Jack's singular warning, and what came of it went the rounds. He was asked to show the brief note many times; but in answer to the questions that came pouring in upon him, Jack could not say more than he had already said with regard to his suspicions concerning the probable writer of the message.

That night Tom and Jack preferred the quiet of their own apartment to the general sitting-room, where the tired pilots gathered to smoke, talk, play games, sing, and give their opinions on every topic imaginable, including scraps of news received in late letters from home towns across the sea.

"Do you know, Tom," Jack said unexpectedly; "I'd give something to know where Bessie Gleason is just at this time. It's strange how often I think about that young girl. It's just as if something that people call intuition told me she might be in serious trouble through that hard-looking guardian of hers, Carl Potzfeldt."

Tom smiled.

Bessie Gleason was a very pretty and winsome girl of about twelve years of age, with whom Jack in particular had been quite "chummy" on the voyage across the Atlantic, and through the submarine zone, as related in "Air Service Boys Flying for France." The last he had seen of her was when she waved her hand to him when leaving the steamer at its English port. Her stern guardian had contracted a violent dislike for Jack, so that the two had latterly been compelled to meet only in secret for little confidential chats.

"Oh, you've taken to imagining all sorts of terrible things in connection with pretty Bessie and her cruel guardian. He claimed to be a Swiss, or a native of Alsace-Lorraine, which was it, Jack?"

"Uh-huh," murmured Jack Parmly, his thoughts just then far away from Tom and his question, though fixed on Carl Potzfeldt and his young ward.

Bessie Gleason was a little American girl, a child of moods, fairylike in appearance and of a maturity of manner that invariably attracted those with whom she came in contact.

Her mother had been lost at sea, and by Mrs. Gleason's will the girl and her property were left in Potzfeldt's care. Mr. Potzfeldt was taking her to Europe, and on the steamship she and Jack Parmly had been friends, and as Potzfeldt's actions were suspicious and, moreover, the girl did not seem happy with him Jack had been troubled about her.