Statistics for occurrence #1 of “Capts. Robertson” in chapter 25 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.:

...s commenced shortly before daylight and successfully executed. Meade's and Griffin's brigades were the first to leave the ground. Seymour's brigade covered the rear, with the horse-batteries of Capts. Robertson and Tidball; but the withdrawal was so skilful and gradual, and the repulse of the preceding day so complete, that, although the enemy followed the retreat closely and some skirmishing occurred, he d...
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