“Hold on,” said Ollenor.

The man came across the pinnace and jumped into the picket-boat’s cabin. Sentley glanced at him, hesitated a moment, and then retired into the inner cabin, whither the others followed him.

“Who do you think that is?”

“An engineer, probably.”

“But does even an engineer officer go ashore in a bowler hat?”

“I don’t know.”

“I don’t believe it’s an officer at all.”

“It must be. He’s wearing plain clothes.”

“At any rate, we are on the safe side—coming in here,” said Sentley.