the portion pressed by the player is on the far right jack; a wire with leather stud on top, known by the workmen as the "old man's head" whalebone rear guide, projects from the end of the key, works in a groove to keep the key steady hammer; strikes the string to produce sound whalebone jack, called the mopstick damper; when in lowered position stops the sound of the string whalebone damper spring References 18th-century English people 18th-century German people Piano makers English musical instrument makers German musical instrument makers English people of German descent 1726 births 1783 deaths Place of death unknown