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Alvin McDonald
Alvin Frank McDonald (1873 – December 15, 1893) was an early American caver and tour guide at what became Wind Cave National Park in South Dakota, the sixth longest cave system in the world, from 1889 to 1893.〔(Biography of Alvin McDonald ), (Wind Cave National Park ), National Park Service, USA.〕
From the age of 16 until he was 20, he discovered and mapped the first of the cave using candlelight. His exploration and mapping was so extensive and thorough for the time that it was not until 1963, 70 years after Alvin McDonald's death, that major new passageways were discovered in Wind Cave.
== Arrival at Wind Cave ==
McDonald was born in Franklin County, Iowa, and moved to Wind Cave in 1890. His father, Jesse D., had been hired in 1889 by the South Dakota Mining Company to oversee the company's "mining claim". It is not known if the mining company expected to find minerals of value in the cave or just planned on developing it for tours. The McDonald family decided to attempt to make a living from the cave by developing it with enlarged passageways and wooden ladders and steps with the hope of attracting travelers from nearby Hot Springs.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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