Statistics for occurrence #1 of “Washington, D. C.” in chapter 12.89 of Southern Historical Society Papers, Volume 7.:

... says the order did not express the facts in the case as far as he was concerned. The day after Hooker was placed in command he read the following letter from Mr. Lincoln: Executive mansion, Washington, D. C. , January 26, 1863. Major-General Hooker: General — I have placed you at the head of the Army of the Potomac. Of course I have done this upon what appears to me to be sufficient reasons. ...
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