Statistics for occurrence #1 of “Shenandoah River” in chapter 3 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 4: The Cavalry:

...n back, when General Johnston, on the 18th of July, 1861, moved from the Shenandoah valley to Manassas, he left a body of cavalry, under Colonel McDonald, scattered throughout the country between the Shenandoah River and the North Mountains. In this body was a company from Fauquier County, commanded by Turner Ashby. Later on, this company was organized into a huge regiment of which McDonald was colonel; Turne...
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