“But how did you know you could see me there?”

“I thought I could. I was watching for someone a little while ago, and saw the captain looking down through here.”

“I thought as much,” said Humphrey, half aloud; and he was about to speak again when Bart entered suddenly, looked sharply round, and showed the wisdom of his new visitor by going straight to the window and looking out.

“Who were you talking to?” he said, gruffly, as he came back, still looking suspiciously round.

“To myself,” said Humphrey, quite truthfully, for his last remark had been so addressed.

Bart uttered a grunt, and glanced at the dinner.

“Done?” he said.

“No. Surely I may spend as long as I like over my meals here.”

Bart nodded and went out, the heavy curtain falling behind him; while Humphrey slowly rose and went back to the stone altar, where he filled a silver cup from the flask and drank, and then began humming an air. After this he walked to the curtain and peered cautiously through into the dark corridor, to see the heavy figure of the buccaneer’s henchman go slowly along past the patches of dull green light streaming through the openings which occurred some thirty feet apart.

“Gone!” said Humphrey, returning quickly. “Are you there?”