"The only trouble is we
can't tell whether it was going or coming--that is we don't know
which way to go."
"That's so," agreed his companion. "And so the only thing to do
is to travel a bit both ways. The path, or road, or whatever you
call it, is plainly enough marked here, though you can't always
pick out the tire marks. They show only on bare ground. The grass
doesn't leave any tracks that we can see, though doubtless they
are there.
"But as for thinking this car is the same one the marks of
which you saw on the lonely moor, the night you heard the call
for help--that's going too far, Tom Swift."
"Yes, I realize that. Of course there must be more than one car
with tires which have square protuberances. But it's worth taking
a chance on--following this clew."
"Oh, sure!" agreed Jackson.
"The only question is, then, which way to go," returned Tom.
They settled that, arbitrarily enough, by going on in the
direction they had started after leaving the stranded airship.
They followed a half-defined path, and were rewarded by getting
occasional glimpses on bare ground of the odd tire marks.
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