These may Certify that the Subscriber has frequently seen Mr. Fitch’s Steam Boat which with great labour and Perseverance he has at length compleated and has likewise been on board when the Boat was worked against both Wind and tide with a very considerable degree of velocity by the force of Steam only. Mr. Fitch’s merit in constructing a good Steam Engine and applying it to so useful a purpose will no doubt meet with the encouragement he so justly deserves from the generosity of his Countrymen, especially those who wish to promote every improvement of the useful Arts in America.