expect, later, to give your students a practical demonstration in
how the biplanes are put together, so they may understand something
of how to make repairs.

"We came on from the nearest army aviation grounds, and had a most
successful flight. I must send back word to Major Dalton."

"Our telephone, or telegraph service, is at your disposal," said
Colonel Masterly. "If you will come with me--"

"Excuse me, but we carry with us our own means of communication,"
said Captain Grantly with a smile. "We are going on the assumption,
constantly, that we are in an enemy's country.

"Consequently we go prepared as though there were a state of war.
We shall communicate with our base by means of wireless."

"I am afraid we can't accommodate you there," went on the head of
the military school. "We are installing a wireless outfit, but it
is not yet completed," the colonel said.

"Oh, we carry our own!" was the unexpected retort. "Lieutenant
Larson, if you and Lieutenant McBride will get the balloon ready,
Captain Wakefield and myself will work out the cipher dispatch, and
send it.

"We use a code in our wireless," he went on to explain, "and it
takes a few minutes to make up the message."

"But I heard you speak of a balloon," said Colonel Masterly. "I