Promptly Stanhope appeared in Readestown Thursday of that week. He went at once to the machine shops.
He found Frank there awaiting him. They shook hands warmly.
“You are on hand promptly,” said Frank, “but I think I can give you a great surprise.”
“Then the submarine boat is an accomplished fact?”
“Yes.”
“I am curious to see the great wonder.”
“You shall have your wish gratified.”
They left the office and went at once out into the yard.
Frank led the way to the tank, an immense affair with a depth of forty feet, sufficient to float a war cruiser.
This tank, or artificial pond, was connected with a deep canal by a gate and locks.