You were looking--"

"For the wireless tower," smiled the Major.

"And now," he went on, "I think we will just rest easy on our wings for a
few weeks. You will get the engines in shape; take a few trial flights,
if you wish, but be careful to conserve gasoline. We must have enough to
carry us to Great Bear Lake. There we will find a sufficient supply to
carry us on any other journey we may decide on. The trader uses gasoline
to run his electric plant and will have a supply. It will not be of very
high test, but with two engines I think we will make it answer our
purpose. If we find that my theory regarding the location of the tower is
not correct, we will buy a supply from him, and if it _is_ correct--" He
did not finish, but smiled and poked the fire again.

"Take it all in all," said Barney to Bruce some time later, "I think our
trip promises to be dangerous enough to satisfy even a bloodthirsty young
savage from the Canadian army."

"Or a young Cherokee from the wilds of Boston Commons," laughed Bruce,
heaving a wrench in the general direction of his companion.

But, though they went about their work in a playful mood, they did it
with great care. After they had taken the two little Timmies for several
rides, they declared the airship quite ready for further voyaging. "And
as for gasoline," said Bruce, "we still have two hundred and forty
gallons in the tank which will give us a-plenty for the trip, and
several hours to spare; but coming back--that's another matter."

Barney realized that this was, indeed, another matter, and, though he