A medium clipper is a type of clipper designed for both cargo carrying capacity and speed. An evolutionary adaptation of the extreme clipper, the medium clipper had been invented by 1851, when the hull type appeared in U.S. shipyards. Medium clippers continued to be built until 1873, when Pilgrim, one of the last known medium clipper ships to be built, was launched by Joshua T. Foster from the shipyards of Medford, Massachusetts.