In May 1904 a hydrofoil boat was described being tested on the River Seine "in the neighbourhood of Paris". This boat was designed by Comte de Lambert. This had 5 variable pitch fins on the hull beneath the water so inclined that when the boats begins to move "the boat rises and the planes come to the surface" with the result that "it skims over the surface with little but the propellors beneath the surface". The boat had twin hulls 18 foot long connected by a single deck 9 foot wide, and was fitted with a 14HP De Dion-Bouton motor, the boat was reported to have reached 20 mph. It was stated that "The boat running practically on its fins resembles an aeroplane".