John William Mackay
John William Mackay (November 28, 1831 – 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.
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| Birth date | November 28, 1831 |
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| Date of death | July 20, 1902 |
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