Bow used by Dr. T.W. Parry for experiments on neolithic trephining, English, 1930-1970

Bow used by Dr. T. Wilson Parry for experiments on neolithic trephining, English, 1930-1970. Parry was researching into the efficiency of various tools and techniques used for trephination. Trepanning was the ancient practice of cutting holes in the skull, probably with the intention of releasing evil spirits or demons from the mind, which were believed to be responsible for causing mental problems or headaches. The bow was made of springy wood, with a leather thong wound around the drill. The drill tip was positioned on the head and the bow was sawed to and fro