"dust devil" Encyclopedia entry on Brittanica.com

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Inauguration of Mr. Lincoln, March 4, 1861 digital file from b&w film copy neg.

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"The Dark Ages...How Dark Were They, Really?: Crash Course World History #14" YouTube, CrashCourse

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Washington before Yorktown digital file from original item, Note on front: Rembrandt Peale, Washington Before Yorktown, 1824-1825, Oil on canvas, 139 x 121 inches. The Corcoran Gallery of Art, Gift of the Mount Vernon Ladies Association

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Federal Writers' Project: Slave Narrative Project, Vol. 14, South Carolina, Reflections of Ezra Adams

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"7 Popes Who Changed History" by Christopher Klein, an article on History.com

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Reynolds's political map of the United States, designed to exhibit the comparative area of the free and slave states and the territory open to slavery or freedom by the repeal of the Missouri Compromise

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"British Occupation of American Port Cities during the Revolutionary War" by Donald Johnson (2025).

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“U.S. Attacked,” Potomac News & Manassas Journal Messenger (Manassas, Virginia), September 11, 2001, Extra Edition. Courtesy of Potomac News & Manassas Journal Messenger.

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"Twenty Years After 9/11, a Cloud of Pessimism Hangs Over the Country" Vanity Fair

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