Statistics for occurrence #1 of “General Halleck” in chapter 6 of William Schouler, A history of Massachusetts in the Civil War: Volume 1:

...side, who had been summoned from North Carolina to a consultation with General Halleck; and they both left, that same day, for this place, to confer with General McClellan. This move on the part of General Halleck was intended to be kept a great secret, and he left Willard's almost in disguise; but, though no one at Fortress Monroe or this point knew of the visit, it was duly recorded by those admirable spies ...
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