3. The keel plate.

4. The two ends of the ship, iron plated.

5. Iron bolts and screws.

6. How deep the ship goes into the water when awash.

7. The pivots on which the paddle-wheel turns.

8. Air holes.

9. Gallery along which men can move.

The inset is a drawing of the paddle-wheels which fill the centre
portion of the boat and which work upon the pivot marked 7.]

Vain would it be for ships lying in harbor to be regarded as
safe, for the inventor could reach anywhere unless prevented
by betrayal. None but he could control the craft. Therefore it
may truly be called the lightning of the sea.

Its power shall be proven by a trip to the East Indies in six
weeks or to France and back in a day, for as fast as a bird
flieth can one travel in this boat.

This boat was 72 feet in length, and her greatest height was 12 feet,
while the greatest breadth was 8 feet, tapering off to points at the
end. Capt. Murray Sueter in his book on submarines gives these and other
particulars of the vessel. At either end the boat had a cabin, the air