Jumping aboard and bidding the rower to wait for him, Frank dashed madly for Lord Hastings’ quarters.

The commander of the D-16 rose quickly to his feet as his door was thrown violently open and Frank, gasping for breath and with pale face, stood before him.

“What’s the matter?” demanded Lord Hastings anxiously.

“Jack—Jack—arrested,” panted Frank.

Lord Hastings drew close and took him by the shoulders.

“Take your time,” he said quietly. “Nothing was ever gained by too great haste. Get your breath and then tell me what the trouble is.”

For another half a minute Frank gasped on, then finally was able to speak more calmly.

“Jack has been arrested,” he said.

“What for?” asked Lord Hastings calmly.

“He’s accused of trying to assassinate the Czar.”