Robert Fulton
The first successful trial run of a steamboat had been made several years earlier in the United States by inventor John Fitch, on the Delaware River on August 22, 1787. Attendees included delegates from the Constitutional Convention, who were observing while taking a break from their summer-long sessions at Independence Hall. The steamboat was propelled by a bank of oars on either side of the boat. The following year Fitch launched a boat powered by a steam engine driving several stern-mounted oars. These oars paddled in a manner similar to the motion of a swimming duck's feet. With this boat he carried up to thirty passengers for hire on numerous round-trip voyages on the Delaware River between Philadelphia and Burlington, New Jersey.
William Longstreet
Born in Allentown NJ as a boy, he moved to Augusta, Georgia. As early as 26 September 1790, he addressed a letter to Thomas Telfair, then governor of Georgia, asking his assistance, or that of the legislature, in raising funds to enable him to construct a boat to be propelled by the new power. This was three years before Robert Fulton's letter to the Earl of Stanhope announcing his theory “respecting the moving of ships by the means of steam.” Failing to obtain public aid at that time, Longstreet's invention remained for several years in abeyance until, at last securing funds from private sources, he was enabled to launch a boat on Savannah River, which moved against the current at the rate of five miles an hour. This was in 1807, a few days after Fulton had made a similarly successful experiment on the Hudson River.