Statistics for occurrence #1 of “Gen. Halleck” in chapter 29 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.:

...also laden with supplies. I am, very respectfully, your most obedient servant, Rufus Ingalls, Chief-Quartermaster. Gen. R. B. Marcy, Chief of Staff On the 9th I received this despatch from Gen. Halleck : I am of the opinion that the enemy is massing his forces in front of Gens. Pope and Burnside, and that he expects to crush them and move forward to the Potomac. You must send reinforcements...
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