at does that mean?" cried Mr. Pertell. "I didn't order two films
made, and besides----"

"That isn't one of our men!" interrupted Russ, as he sprang away from
his camera.

"Who is it?" Mr. Pertell wanted to know.

"It's one of our rivals. Someone from the International concern!" cried
Russ. "They've followed us to steal some more of our ideas!"

"You're right!" shouted Mr. Pertell. "This will have to stop!"

Together he and Russ, followed by Paul, made a dash in the direction of
the rival photographer. But the latter saw them coming, and hastily
picking up his machine he ran toward a clump of woods not far off. And
by the time his pursuers reached there he was not to be found, though
they searched about for some time.

CHAPTER X

THE CYCLONE

"All aboard!" called the conductor of the way train that had been held
up to allow the shooting of the oil well. "All board!"

"Come," summoned Mr. Pertell to his moving picture players. "We'll get
along now. That stop was a lucky one for us."

The train could now proceed, all danger from the delayed charge in the
well being over. Just what had caused it to "hang fire" was never
learned. But the shooting of the well was a success, and as the train
pulled out, Paul having gotten rid of his borrowed clothes, the workmen
were seen hurrying about, taking care of the valuable flow of petroleum.

"What do you make of the action of that International man?" asked Russ,
as he took a seat beside the manager.

"I don't know what to make of those fellows," was the answer. "They must
be following us pretty closely; but I don't see how they knew we were
going to film the oil well."

"They didn't know it," decided Russ. "They've had a spy on our trail,
following us; that's how it was done. You know we saw that fellow Wilson
looking at the destination marked on the baggage checks. He probably
sent word to the concern and they started out a camera man to follow us.
It would have to be someone we hadn't seen before, so of course Wilson
himself would not do, though I understand he can operate a machine
fairly well."

"I guess you've got the right idea," agreed Mr. Pertell. "This fellow,
whoever he was, made inquiries and learned where we were headed for.
Then with his camera he simply kept on the same train with us."

"And when we stopped here to get the oil well pictures," resumed Russ,
"he trailed along and set up his machine. He got all the benefit of our
players' acting