John Filson, Daniel Boone (1793). “The discovery, settlement and present state of Kentucky, and an introduction to the topography and natural history of that ... country. Also colonel Daniel Boon's narrative of the wars of Kentucky”, p.35
John Muir (2015). “John Muir’s Incredible Travel Memoirs: A Thousand-Mile Walk to the Gulf, My First Summer in the Sierra, The Mountains of California, Travels in Alaska, Steep Trails… (Illustrated): Adventure Memoirs & Wilderness Studies from the Naturalist, Environmental Philosopher and Early Advocate of Preservation of Wilderness, the Author of The Yosemite and Picturesque California”, p.14, e-artnow
John Filson, Daniel Boone (1793). “The discovery, settlement and present state of Kentucky, and an introduction to the topography and natural history of that ... country. Also colonel Daniel Boon's narrative of the wars of Kentucky”, p.43