Statistics for occurrence #1 of “Gen. Pleasonton” in chapter 35 of Elias Nason, McClellan's Own Story: the war for the union, the soldiers who fought it, the civilians who directed it, and his relations to them.:

... the corps commanders to press forward their pickets. at early dawn. This advance revealed the fact that the enemy had left his positions, and an immediate pursuit was ordered; the cavalry, under Gen. Pleasonton , and the three corps under Gens. Sumner, Hooker, and Mansfield (the latter of whom had arrived that morning and assumed command of the 12th [Williams's] corps), by the national turnpike and Boonsboro...
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