In the rough sea that was running their work was doubly hard. But Eph
kept the searchlight all the time turned in the direction of the top
of the bobbing mast stump. In a circle they went around it, barely
thirty feet from the broken mast, Jack heaving the sounding lead.
At last he felt it rest on the deck of the sunken derelict. The distance
below was six fathoms--thirty-six feet.
"Now, we've got the line of the hull," called Benson to the lieutenant.
"Our next job is to find how far back this hull runs under the water."
This knowledge, also, was gained, at last. Then Jack Benson, rising,
hastened back to the conning tower, followed by Danvers. Jack himself
closed the manhole, while Eph still trained the searchlight through the
darkness of the night. Stormy weather was threatening.
"Now, hustle below, Eph, and get that loaded torpedo into the tube,"
commanded Skipper Jack Benson.
"My men will help you," added Lieutenant Danvers.
Jack quickly had his figures made. He knew where the hull lay, in what
direction, and how far below the surface the deck of the sunken
derelict lay.
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