Gleason. "And though we were told we would meet
friends here we could not guess it would be you brave boys."

"Spare my blushes!" laughed Tom.

"Same here," added Jack.

"But what brings you to Paris?" asked Bessie. "I thought you boys were
engaging in combats above the clouds."

"We have been fighting, though not during the last two weeks," said Tom.
"I had word that my father had come over here, but he never communicated
with us, and we came to Paris to look him up. So far we haven't
succeeded in finding him," and he gave the details of the visit of
himself and his chum to the capital, telling of their first experience
during the firing of the big gun.

Bessie and Jack, who seemed to have much to say to one another, peered
from behind the curtains out of the window now and then, and Jack at
last reported that the spy had passed on, after stopping, apparently, to
purchase some fruit at a stand on the street.

"I don't believe he knew we were here," said Bessie.

"Well, it won't do to take any chances," observed Tom. "However, we were
not told to remain under cover, so I suppose we can go out when we
like."

"Better wait until we get some word from the major," suggested Jack, who
was getting some of his chum's caution.

All decided this was best, and the boys spent the rest of the afternoon
in getting their room to rights, Mrs. Gleason and Bessie doing the same
in their apartment. Mrs. Gleason had temporarily been relieved from Red
Cross work to recuperate, she said, as she had been under a great
strain.

Toward evening Major de Trouville, or "Trouville," as he democratically
liked to be called, arrived, and when told of the sight in the street of
the spy, who turned out to be the same man who was one of the captors of
Bessie and her mother, the officer said:

"I am not surprised. In fact I rather looked for that, and it is one
reason why I wanted to get you four together so you could see the man at
the same time.

"There is now no doubt as to his intentions, and the fact that he was
here so soon after you arrived proves that there is a 'leak' somewhere.
We suspected as much, and I think I know where it is. It is good
information to have. Well, boys, did I surprise you?" he asked, smiling.

"You did, indeed, but it was a pleasant surprise," said Jack.

"But when are we going to be allowed to do something to silence that
monster cannon?" asked Tom. "It's pleasant to be here, but we are not
forgetting th