Located at the bridge on the same side as Shepherd College, directly across from the Bavarian Inn.
My bridge photo did not turn out.
(1743-1792) was an American mechanical engineer chiefly known for exhibiting a boat propelled by machinery in 1787 on the Potomac River at Shepherdstown, now West Virginia, before a crowd of local notables, including Horatio Gates. A pump driven by steam power ejected a stream of water from the stern of the boat and thereby propelled the boat forwards.
More about Mr. Rumsey in another marker located at Sir Johns Run.