"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 railroad wreck?"
"Looks like—" began Mark, when he was interrupted by a voice calling:
"Hurry up, Perfessor! De boys has awakened from de unconsciousability!"
And, to the astonishment of Jack and Mark, the old man and his negro helper hurried from the inner room and stood in front of the bed.