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Lovelock Cave - Loud and Harrington (1929) by Llewellyn L. Loud, M.R. Harrington (published by University of California Press) states that a pre-Indian burial in Lovelock Cave, Nevada has mummies and materials that were different from other Indian grave sites. They were taller, had European skull/skeletal structures, and red hair.
https://archive.org/details/LovelockCaveLoudAndHarrington1929
Sarah Winnemucca Hopkins said in her book - Life Among the Piutes: Their Wrongs and Claims (1883) - over a span of 3 years, her tribe killed 2600 reddish-haired White people living along the Humboldt River, and that the last of the White natives were smoked out of a cave a burned to death. Lucy Thompson said in her book - To the American Indian: Reminiscences of a Yurok Woman (1916) - that White people were found to inhabit all of North America.