"Taurus wirelessed twenty minutes ago," he reported, as the two officers entered the chart-room. "She was then at the extreme limit of her northerly course. You ought to sight her very shortly. Here's our course"—he indicated the pencilled line on the chart. "Nothing to report: there never is when I'm officer of the watch. It's this infernal monotony that plays havoc with a fellow's nerves."

Noel Fox nodded sympathetically. Although the Capella had been only six days on her new station—keeping a watch on the Dutch coast between the Texel and the North Hinder Lightship—he, too, was mightily "fed up" with the task of "treading on the tail of Germany's coat".

Not so much as the periscope of a hostile submarine had been sighted. The German torpedo-boats that occasionally sneaked southwards from Borkum were taking an enforced holiday. Perhaps it was in sympathy with the "High Seas Fleet" skulking in the Kiel Canal. In any case, the six motor craft of the Capella class had a full share of wintry conditions in the North Sea without any compensating adventures to mitigate the monotony.

As Eccles descended from the bridge, a great-coated muffled-up figure, followed by a large dog, swung himself up the ladder.

"Morning, Haye," was Noel Fox's salutation, as he stooped to pat Shrap, the chartered libertine of the Capella. "Dash it all, it is cold! Makes a fellow wish he were a sheep-dog. Here, Shrap, off you go and get your whiskers trimmed. I can see Tomkins waiting for you."

The dog needed no second order. Every morning just after eight bells Shrap would be taken over by the watch below. Every man took a delight in combing the animal's long hair, until Shrap's coat was the pride of the Capella's crew and the envy of the rest of the flotilla, whose mascots never aspired to be more than a tame rat, parrot, or canary.

"Sail on the port bow, sir," bawled the look-out.

The Sub and the midshipman promptly levelled their telescopes. A small cargo-steamer was pitching and rolling as she forged slowly ahead on a westerly course. Although she was fairly discernible against the pale grey of the eastern sky, it could be taken for granted that from the Dutchman's bridge the neutral-grey-painted Capella would be practically invisible.

"She's slowing down," declared Vernon.

"What on earth for?" enquired the Sub. "She couldn't possibly have spotted us. Starboard your helm, quartermaster. Good! Keep her at that. We'll get her to make her number, if nothing else."