Time travel with Sara back to the US Oregon territory in 1844 where a dispute about a horse went really wrong and inspired some super shitty laws about who could and could not live in the Oregon territory.

Sources:

• https://www.oregonencyclopedia.org/articles/cockstock-incident/#.YX3y1dnMJ0s
• https://oregonhumanities.org/rll/magazine/skin-summer-2013/dangerous-subjects/
• https://www.oregonencyclopedia.org/articles/white-elijah/#.YYWr2tnMJbU
• https://www.oregonencyclopedia.org/articles/saules-james-d/#.YYWr7dnMJbU
• https://www.oregonencyclopedia.org/articles/exclusion_laws/#.YYWr_dnMJbU
• Taylor, Quintard. "Slaves and Free Men: Blacks in the Oregon Country, 1840-1860." Oregon Historical Quarterly, vol. 83, no. 2, Oregon Historical Society, 1982, pp. 153–70, http://www.jstor.org/stable/20613841.
• https://www.washingtonpost.com/news/retropolis/wp/2017/06/07/when-portland-banned-blacks-oregons-shameful-history-as-an-all-white-state/
• Coleman, Kenneth Robert, ""Dangerous Subjects": James D. Saules and the Enforcement of the Color Line in Oregon" (2014). Dissertations and Theses. Paper 1845. https://doi.org/10.15760/etd.1844