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In page Mammoth Cave National Park:

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The 31,000-acre (13,000 ha) tract known as the "Pollard Survey" was sold by indenture on September 10, 1791 in Philadelphia by William Pollard. 19,897 acres (8,052 ha) of the "Pollard Survey" between the North bank of Bacon Creek and the Green River were purchased by Thomas Lang Jr., a British-American merchant from Yorkshire, England, on June 3, 1796, for £4,116/13s/0d (£4,116.65). The land was lost to a local county tax claim during the War of 1812.[citation needed]