"Master out, get knockum," said the giant. "We find you on desk. Rad callum medicine man now."

"What Am I Doing Here?"

"A doctor? No, I'm all right. Tell him to cancel the call." Tom managed to struggle to his feet. "I remember now! Some kind of gas must have been used on me. But I must see to the office. Maybe I've been robbed."

Leaning heavily on the giant's arm, Tom walked as fast as he could into the laboratory. At first glance everything seemed to be in order, and to his relief he found the vault was locked.

The Vault Was Locked

The young inventor did not know that a key was missing from his ring, nor, as he twirled the dial of the combination-lock, did he realize that a slender lever had been severed from below, thus rendering useless the intricate mechanism.

"Who done dis to you', Massa Tom?" asked Rad.

"Wish I knew. Anyhow, there's been no damage done except to me! My head's splitting, so I must get to bed. Koku, stay on guard here from now on until I return from Cuba. And get several of the men to relieve you. Another thing: I don't want either of you to mention this affair to anyone. Dad would hear about it and worry."