It was true. The ruse was plainly apparent now that it was too late to prevent it. The two sunken vessels made further progress up the river by the British ships impossible.
"Wonder what we shall do now?" asked Frank.
"Haven't any idea," said Jack briefly.
Night drew on and still the British guns continued to hurl their shells upon the German town.
With the fall of darkness there came an answer to Frank's question.
Captain Marcus summoned Frank and Jack.
"The Germans have effectually blocked the river," he told them. "Therefore we cannot capture the town that way. Because of your experience, I have called you two lads to undertake a most dangerous mission.
"You," pointing to Jack, "will lead 400 sailors around through the woods and attack the enemy from the flank. You, Mr. Chadwick," turning to Frank, "I shall put in command of a fleet of four small boats, armed with rapid-firers, and it will be your duty to try and crawl up the river without attracting the attention of the forts. Attacking from two sides, simultaneously, we should take the town. In the meantime we shall continue to shell the town, stopping our bombardment at such a time as I believe you will be prepared for a sudden attack. Therefore, when you reach your positions, you will not attack until the bombardment ceases. That shall be your signal. Do I make myself clear?"
"Perfectly," both lads agreed.
"Good, then. Everything shall be in readiness for you in an hour."