“Keep steady, Kemp, for God’s sake! I want help badly. Stop!”

The hand gripped his arm. He struck at it.

“Kemp!” cried the voice. “Kemp! Keep steady!” and the grip tightened.

A frantic desire to free himself took possession of Kemp. The hand of the bandaged arm gripped his shoulder, and he was suddenly tripped and flung backwards upon the bed. He opened his mouth to shout, and the corner of the sheet was thrust between his teeth. The invisible man had him down grimly, but his arms were free and he struck and tried to kick savagely.

“Listen to reason, will you?” said the invisible man, sticking to him in spite of a pounding in the ribs. “By heaven! you’ll madden me in a minute!

“Lie still, you fool!” bawled the invisible man in Kemp’s ear.

Kemp struggled for another moment and then lay still.