Maybe it was the famous bank robber Jesse James or an extremely dangerous gunman named John Wesley Hardin.

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However,much of what we know today about the Grand Canyon was recorded by John Wesley Powell.

VOA: special.2009.10.07

John Wesley Powell's reports and maps from the trip made him famous.

VOA: special.2009.10.07

John Wesley was himself a member of the Moravian church in the early 1740s.

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He insisted the church would carry on and added that John Wesley, the 18th century founder of Methodism, which sponsors the site, faced similar abuse.

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When he thought of Curiosity at Gale, it reminded him of John Wesley Powell, the great nineteenth-century geologist and explorer, peering over the edge of the Grand Canyon for the first time.

NEWYORKER: The Martian Chroniclers