Sketch of Turtle based on an Account, partly erroneous, as for the Propeller at least which is not a Screw Propeller but a Paddle one David Bushnell, 36 years old, a medical student, together with renowned Inventor and Mechanic Isaac Doolittle, 55 years old, and with Phineas Pratt, a carpenter, built last year a strange gear, nicknamed and finally named Turtle owing to its shape and to its look when immersed in water. "The shape of the hull has the nearest resemblance to the