Alf was now employed in the engineering offices of Reade & Hazelton.
"There's something coming," announced Reade, presently.

"It sounds like a miniature railroad train." "I wish it were a real one, and that we had our baggage aboard," muttered Harry, with a grimace.
One of the sentries had gone to intercept the approaching object.
Instead the soldier now permitted the approaching object to roll into camp.

It proved to be Don Luis's big touring car.

In the tonneau sat the mine owner and Dr.Carlos Tisco.
"What is this, Senor Reade ?" cried Don Luis Montez, in pretended astonishment.

"In trouble?
Lieutenant, these gentlemen are friends of mine.