"Yessir," replied the excited youth, not yet certain whether he was going to be hanged or praised for his offence.

"You have shown more wit and skill than anyone on board the airship. You shall be well rewarded for this, I promise you. How on earth you managed to get three good snapshots like these, all showing different angles of the machine, and to hide them away, is beyond me!"

"Thank you, sir! Thought you'd like 'em," and the boy's eyes sparkled even more than ever as the captain shook him by the hand, and planted five new, crisp Bradburys therein, then dismissed him.

"Great Scott!" exclaimed the captain, "but that little urchin's saved my reputation. These photographs may prove of more value to the authorities than the lost treasure. I feel a different man. Here is extraordinary evidence against the culprit. One photograph shows the fiend actually firing a burst at the twin engines in the rear gondola, and another the faces of the two occupants above the fuselage. They will show more evidence still when they have been enlarged." And the captain, after carefully drying them, placed them in an envelope and put them into his inner coat pocket, muttering:--

"Smart little beggar! I wish I hadn't punished him the other day for smuggling that tobacco aboard."

The captain, who had left strict instructions that he should be called half an hour before the end of the watch, in order that he might relieve the navigating officer, was just about to lie down on the couch for a brief spell, when suddenly another knock at his cabin door startled him, and immediately after his servant entered and announced: "Seven bells, sir."

"Already?" exclaimed the captain.

"Yes, sir."

"Has the moon set, yet?"

"Yes, it is quite dark now, sir."