Finding the house, when they started on their motorcycles, did not
prove as difficult a task as Harry had feared it might. They both
remembered a number of places they had marked from the cab
windows, and it was not long before they were sure they were
drawing near.

"I remember that hill," said Harry. "By Jove -- yes, there it is!
On top of that hill, do you see? We won't go much nearer. I
don't want them to see us, by any chance. All we need is to
notice which way they're signalling."

They watched the house for some time before there was any sign of
life. And then it was only the flashes that they saw. Since the
previous day some sort of cover had been provided for the man who
did the signalling.

"What do you make of it, Dick ?" asked Harry eagerly, after the
flashing had continued for some moments.

"It looks to me as if they were flashing toward the north and a
little toward the west," said Dick, puzzled.

"That's the way it seems to me, too," agreed Harry. "That isn't
what we expected, either, is it?"

"Of course we can't be sure."

"No, put it certainly looks that way. Well, we can't make sure
from here, but we've got to do it somehow. I tell you what.
We'll circle around and get northwest of the house. Then we ought