"Close in."

"I haven't been able to pick up the position of the ship that sent that, sir," the operator volunteered.

"If you can do so," said Lord Hastings, "let me know immediately."

"Do you know what German ships are supposed to be in these waters?" Jack asked of Lord Hastings.

"Why, yes," was the latter's reply. "The armored cruisers Scharnhorst and Gneisenau, the former the flagship of Admiral Count von Spee, and the protected cruisers Leipzig, Dresden and Nurnberg. Why?"

"Well," Jack explained, "judging by the message just picked up, they must be separated. Couldn't we, by representing ourselves as one of these vessels, possibly pick up a little useful information?"

"By Jove!" said Lord Hastings. "We could."

"But how are we to know which ship sent that message?" asked Frank. "We wouldn't want to make a mistake, and we might try to pa.s.s ourselves off as the very cruiser that flashed that message."

"The message was undoubtedly sent from the flagship," said Lord Hastings, "so we are safe enough there. Come with me."

He led the way to the wireless room, where the operator was making unsuccessful efforts to pick up more messages from the air.

Now, at Lord Hastings' direction, he tapped his key.

"Scharnhorst! Scharnhorst!" the instrument called through the air.

There was no reply, and the call was repeated.

"Scharnhorst! Scharnhorst!"

A moment later and there was a faint clicking of the Sylph's apparatus. The call was being answered. The operator wrote it off.

"What ship is that? Admiral von Spee orders all to close in,"

and the exact position of the German flagship was given.

"'Dresden!" flashed back Lord Hastings. "Signed, Koehler."

"I happen to know Captain Koehler commands the Dresden," Lord Hastings confided to the boys.

He sent another message to the German admiral:

"Where are you headed?"

"Falkland Islands," came back the answer.

"To attack the British?" was the message Lord Hastings sent through the air.

"Will sink one British ship in harbor and destroy Wireless plant," was the answer to this query.

"Good!" said Lord Hastings to the lads. "We now know his objective point, and if we could pick up the English fleet we would be prepared to receive them."

"Is there a British fleet in these waters?" asked Jack, in some surprise.

"Yes," replied the commander of the Sylph. "Vice Admiral Sir Frederick St.u.r.dee, chief of the war staff, is hereabouts with a powerful fleet. The fact has been generally kept a secret, but I am in possession of that much information."

"Do you make the Germans' position closer to the Falkland Islands than ours?" asked Frank.

"No," replied Lord Hastings. "Judging by the action of the wireless, I should say we are fifty miles closer."

"Then," said Frank, "why cannot we make a dash for the Islands?

We can put in there and give warning. Besides, it may be that some of the British fleet is near there."

"A good idea," replied Lord Hastings. "It shall be acted upon at once."

Under full speed the Sylph dashed forward toward the Islands.

"I don't expect we shall pick up the Falklands before morning,"

said Lord Hastings, "and we shall have to keep a sharp lookout tonight, for we are likely to b.u.mp into a German cruiser prowling about here some place."

"Scharnhorst trying to raise the Dresden again," said the wireless operator to Lord Hastings, with a grin.

"Let her try," replied Lord Hastings. "Guess Admiral von Spee will think it funny he gets no reply, but he'll think it funnier still when he finally does raise the Dresden and learns that it was not she who answered his other call."

And it was not long until the real Dresden did reply. The Sylph's operator picked up the messages that were exchanged.

"Dresden, Koehler!" came the response to one of the flagship's calls.

"What is the matter?" came the query. "Why did you cease communicating?"

"Don't understand," was the reply. "Have not communicated with you before."

"Didn't you acknowledge my call fifteen minutes ago?"

"No!"

Even the ticking of the wireless instrument now grew nervous, and it was plain that the sender was laboring under stress.

"Received message signed 'Dresden, Koehler, fifteen minutes ago,"

came from the flagship. "Did you send it?"

"No," was the reply flashed back. "Picked you up now for the first time."

"Enemy must have picked up call and answered then," flashed the flagship. "Heed only code messages in future, and answer in kind."

Thereafter, although the operator picked up the messages pa.s.sing between the two ships, they were only a jumble. In spite of all attempts of Lord Hastings and the two lads to decipher the code, they remained in ignorance of further communication between the enemy's ships.

"Well," said Lord Hastings. "We have scared them up a little bit, anyhow."

"I should say we have," replied Jack. "They don't know whether we are one or a dozen."

"But," said Frank, "they probably will make for the Falklands now faster than ever."