"Are dem young gen'men all hunky-dory?"

"They are coming on nicely," was the old man's reply. "They will recover
consciousness in half an hour and we can feed them, and give them some
medicine. Come along, Washington."

The two passed out through the much-locked door behind the bed, the
undoing of the fastenings taking some time. As the portal swung open it
disclosed a long shed which seemed to be occupied with a big, strange
object.

The old professor and the negro had not been gone more than five minutes
before Jack opened his eyes. He turned over on one side. As he did so
Mark slowly lifted his head.

"Hello!" cried Jack, faintly.

"What's the matter?" asked Mark.

"Matter? What? Where?" inquired Mark, sitting up.

"Here! Everywhere!" replied Jack, raising himself slowly on his elbow.
"All I remember is a terrible crash. Now look at all those wheels.
Wheels! Wheels! Wheels! I wonder if they can be in my head?" and he
tried to smile.

"No, they are real wheels, and they are on the walls," announced Mark.

"Then where in the world are we?" went on Jack. "In a machine shop or a