strenuous fights in the air, Tom and Jack received notice that they
could report to the first United States air squadron, which was then
being formed on that part of the front where the first of Pershing's
men were brigaded with, the French and British armies.

Du Boise, who had brought word back of the fate that had befallen
Harry Leroy, sent for Tom and Jack when it became known that they
were to leave.

"Shall I ever see you again?" he asked wistfully.

"To be sure," was Tom's hearty answer. "We aren't going far away,
and we'll fly over to see you the first chance we get. Besides,
we're going to depend on you to give us some information regarding
Leroy. If the Huns drop any message at all they'll do it at this
aerodrome."

"Yes, I believe you're right," assented Du Boise, trying not to show
the pain that racked him. "But it's so long, now, I begin to
believe he must be dead, and either the Huns don't know it or they
aren't going to bother to send us word. But I'll let you know as
soon as I hear anything."

"Is his sister here yet?" asked Jack, for Tom and he had been too
busy the last two days, getting ready to shift their quarters, to
call on Nellie Leroy.

"She has gone back to Paris," answered Du Boise. "There was no
place for her here. I can give you her address. I promised to let
her know in case I got word about her brother."