John Fitch was an American inventor who built the first successful steamboat in the United States. There isn't much information on his written works, as he's primarily known for his engineering and invention. He is known for the following:
* Building the first successful steamboat in the United States (1787)
* Developing a steam-powered ferry (1787)
However, if you have more information about John Fitchett Marsh, like a specific time period or any other details, please provide them, and I can try to help you find his writings.