"Then, listen here," said "Valentine." "I'm sending round a messenger-boy with an important sealed letter. On no account whatever are you to let this letter out of your hands, until you give it to Mr. Russell, the very moment he arrives."
"Valentine," in order to make quite sure that Mrs. Wycherley had heard aright and understood, made Crouch repeat his instructions word for word. That done he rang off, apparently in the greatest haste, no doubt fearing to miss his train.
Captain Crouch was wildly excited. Jamming his white bowler hat well on to the back of his head, he proclaimed that they were hot upon the scent of the gang. Mrs. Wycherley had left him in possession of the key of the flat; and going down to the front door, he waited impatiently for the messenger to arrive.
The messenger-boy had some diffidence about handing over the letter to Crouch, saying that he understood that he was to deliver it to a charwoman. Crouch, however, was not to be denied, and with the sealed letter in his hand returned to Jimmy.
To break the seal and tear open the envelope was the work of a few seconds. The letter was written in German, of which language Crouch and Jimmy knew enough to make out the meaning, though there were one or two words that neither could understand. With the translation of "Valentine's" letter all doubt was dispelled that the unknown "Mr. Russell" was any one else than Rudolf Stork, the ship's carpenter of the "Harlech."
The letter began with the words "Dear Stork," and continued to the following effect: A sea raid had been planned on the North Coast, against the dockyards of the Forth and Tyne. All German submarines had been warned, with the exception of the U93, whose wireless had been probably by H.M. Destroyer "Cockroach." The U93 had come north-eastward from the Lizard, had passed the Straits of Dover in safety, and was now lying somewhere in the vicinity of the Wellbank lightship, which is a little north of the latitude of the Tyne.
Immediately on his arrival in London, Stork was to go to Hull, taking the first and fastest train. Thence, he was to put to sea in a fishing smack, the "Marigold," the skipper of which was in the pay of "Valentine." He was to find the U93, and tell her to proceed due east without delay, to meet the German fleet, issuing from the Bight of Heligoland, and which would comprise some of the biggest battle-cruisers ever built: notably, the "Derfflinger," the "Seydlitz," the "Blücher," and the "Moltke."
Captain Crouch was a man of iron nerve; but, when he realized the colossal magnitude of the plot with which they were confronted, even he could not control the features of his face. As for Jimmy Burke, his lips were parted, and when he held the letter in his hand, the sheet of paper trembled like a leaf. Scene by scene, the great drama that had opened in the offices of Rosencrantz and Guildenstern unfolded itself before the eyes of those who were something more than mere spectators. And each scene, it appeared, was more dramatic, more fraught with terrible consequences and possibilities of triumph or disaster, than that which had gone before.
It took Jimmy Burke some time to find his breath. He was so excited that he found it difficult to speak.
"There's not a moment to lose!" he cried. "We must report what we know both to the Admiralty and Scotland Yard."