1900 U.S. census, Skowhegan, Somerset County, Maine: Charles A. Oak (50) with Nancy Oak and son Ernest L. Oak.
Image · dated 1900 · source: U.S. Census, 1900, Skowhegan, Somerset, Maine, FamilySearch ark:/61903/1:1:MMG9-RGJ; FamilySearch.org, image viewer Download > JPG Only, accessed 3 Oct 2026.

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Keep in mind: Both parents' birthplaces are given as Maine, consistent with Charles being Maine-born; the entry says nothing about Samuel's birthplace. Charles died in June 1900, after the enumeration.