. "1831Z"^^ . "1831-11-28Z"^^ . . . "Mackay, John William"@en . . "American prospectors" . . . "3.0E7"^^ . . . . . . "1902Z"^^ . . "John William Mackay"@en . "1902-07-20Z"^^ . "John William Mackay (November 28, 1831 \u2013 July 20, 1902) was an American industrialist, born in Dublin, Ireland. Mackay was one of the four Bonanza Kings, a partnership which capitalised on the wealth generated by the silver mines at the Comstock Lode."@en .