William Tell Legend

Could any of your readers tell me the true origin of the William Tell apple story? I find the same story told of— (1.) Egil, the father of the famous smith Wayland, who was instructed in the art of forging metals by two dwarfs of the mountain of Kallova. (Depping, *Mém. de la Société des Antiquaires de France*, tom. v. pp. 223. 229.) (2.) Saxo Grammaticus, who wrote nearly a century before Tell, tells nearly the same story of one Toko, who killed Harold. (3.) "There was a souldier called Pumher, who, daily through witchcraft, killed three of his enemies. This was he who shot at a pennie on his…