Statistics for occurrence #1 of “Port Tobacco, Md.” in chapter 1.8 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 7: Prisons and Hospitals.:

... names. After shooting President Lincoln in a box at Ford's Theater in Washington, April 14, 1865, Wilkes Booth escaped from the city. Guided by sympathizers, he crossed the Potomac near Port Tobacco, Md. , to Mathias Point, Va., on the night of Saturday, April 22d. The following Monday he crossed the Rappahannock from Port Conway to Port Royal and took refuge in a barn. Here he was discovered two ...
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