"A Sea Scout just come in, sir," he announced to the man at the typewriter.

The operator wheeled round, and Darby was astonished to recognise his own Scoutmaster, Mr. Arnold Bilverstone. He was aware that Mr. Bilverstone was in the Royal Naval Reserve. What surprised him was that Mr. Bilverstone had so quickly been installed in naval duties, and that he should already be wearing the uniform of a petty officer.

Responding to Darby's salute, Mr. Bilverstone questioned him concerning himself and his adventure, and, gathering a sheaf of papers, said:

"Take these to the Harbour-master. They are lists of selected steam trawlers that are to be brought at once into the inner harbour to be turned into mine-sweepers, flying the White Ensign."

Not Darby Catchpole alone, but several other Sea Scouts of the Lion Patrol were occupied about the town and harbour that afternoon, helping to convert a fleet of fishing boats into a fleet of naval auxiliaries.

Instead of trawling for fish, these stout little vessels were to engage in the perilous pursuit of picking up explosive mines from the waters of the North Sea. It only needed that their funnels and hulls should be painted grey, and that some alterations should be made in their dredging gear, and they were ready for their new and dangerous work, each with her daring crew of naval reserve men.

In the late afternoon, Darby watched the first of them going out, under the escort of a gunboat. It was astonishing how wicked looking a coat of war paint had made them.

He lingered at the naval base until the survivors of the Atreus were landed in boats from the destroyers, and with other Sea Scouts he helped in conveying the wounded to the hospital. On his return he met Mark Redisham, who told him of how Max Hilliger had been on board the German mine-layer.

"I've been looking and asking for him," said Mark, as they walked together across the swing-bridge. "I supposed he'd been picked up by one of the destroyers; but nobody seems to know anything about him. I'm afraid he is drowned. We'd better call and tell his people."

Darby Catchpole shook his head.