"Mark three!" he cried.
"Eighteen feet," said Glennie. "How much do you draw, Mr. King?"
"We ought to have ten feet," answered Matt. "Sharp with it, Dick," he added anxiously. "We must get as close inshore as we can."
"Quarter less three!" called Dick.
"Sixteen and a half," muttered Glennie; "shoaling rapidly. You'd better get that mud-hook down, Mr. King."
"Two and a half!" announced Dick, then: "Two and a quarter!" and finally: "Mark twain!"
Matt was not as close to the shore as he wanted to be, but twelve feet was as little water as he dared keep under the Grampus.
"Let go the anchor!" he yelled to Speake.
Speake promptly repeated the order, and only a very short scope of cable was run out.
The nose of the submarine was brought up short and the stern moved around into the cove as though on a pivot.