Tip-Top station on Moosilauke. Will that do?"

"Yes."

"Then I'll be going," said the guide. "I'll take you over to the
Compton House, and if you want to see me again this evening, you can
call me on the telephone."

Janus had started to move toward the steps preparatory to going about
his duties, when an exclamation from Harriet Burrell caused them to
turn sharply to her.

"There he is! There is the man with the goggles!" she whispered,
pointing toward the store. They saw a stoop-shouldered man standing
with his back against the large window. He was facing them, but, his
face being in the shadow, they were unable to distinguish the features.
The light in the store being at his back, and his head slightly turned
to the steps, toward which Janus was moving, Harriet Burrell was
enabled to look directly through one of the lenses. She saw that the
glass was green and that it masked effectually the eyes of the strange
man.

"Quick, Mr. Grubb!" cried the girl. "The man again! Find out who he
is!"

Janus, who had moved down to the second step, now started back, and was
on the porch with one bound, thrusting the Meadow-Brook Girls aside in
his eagerness to reach the man who had impersonated him.

"Where is he?" shouted Janus, in a voice that brought most of the
villagers from the store on the run. "I see him!" Grubb made a leap,
when, as though he had vanished into thin air, the stranger disappeared
from sight.

The Meadow-Brook Girls gasped in amazement. But Harriet Burrell,
quicker in thought and action than even the guide himself, leaped from
the end of the porch and sped swiftly around the side of the store
toward the rear yard.

CHAPTER II

MISS ELTING'S MYSTERIOUS CALLER

"Come back here!" shouted the guide. Harriet halted. She hesitated at
sight of the black shadows there rather than at the command. She
distinctly heard some one floundering over a high board fence that shut
in the rear yard of the store and post-office. Janus's hand was on her
arm.

"Well, I swum!" he exclaimed.

"Oh, that's too bad. He got away," cried Harriet ruefully. "I was too
slow. I could have caught him just as well as not, had I not been so
stupid as to wait."

Harriet and the guide walked to where her companions were standing, not
certain what they ought to do, not quite sure what had occurred.

"This one's all right," chuckled Janus. "She's got the spunk, but she
needs watching. She'll get the w