For readers interested Pennsylvania and the Mid Nineteenth Century US Navy, I recommend the book John Lenthall by Steven Chaplin Kinnaman.
Kinnaman educated as a Naval Architect provides a detailed biography of Lenthall’s personal and professional life. Beginning as a shipyard apprentice, next Lenthall educated himself in the state-of-the-art of scientific Naval Architecture by a grand tour of British and French shipyards and by collecting books on the subject. He both read and spoke French. Back in the USA he moved up through the naval shipbuilding ranks eventually becoming chief of the Navy’s Bureau of Construction and Repair; the forerunner of the World War II Bureau of Ships.
His first job after returning from Europe was working at the Philadelphia Navy Yard and figuring out how to launch the huge Pennsylvania into the shallow River. From that point on he was involved in the design nearly every major vessel built by the navy up to the Civil War.
During the Civil War, while he had had an excellent relationship with Secretary of the Navy Gideon Wells,
He fell afoul with Well’s assistant Gustavus Fox, and Fox’s friend David Dixon Porter, both promoters of Ericsson and his Monitor concept. As a result once Wells stepped down after the war Lenthall was forced to retire.
Kinnaman has done a remarkable job of digging up information about and presenting Lenthall’s life. This includes much from Philadelphia’s Franklin Institute and Independence Seaport, as well as that shared by living direct descendents.
A remarkable book.
Roger