AN NGBAKA THROWING-KNIFE, with three projections, incised cross hatching to one side; a Zande throwing-knife with curved projections at the top, incised ornament to one side, fibre-bound grip; an Ngombe 'executioner's sword', the curved blade with four knops; and a Mongo sword, the butt of the wood grip carved as a head with brass upholstery nails to the top