On the 7th, 11th, and 12th days of November, 1861, respectively, letters of instruction were addressed by the commander-in-chief to General Buell, in charge of the Department of the Ohio, and General Halleck, in that of the Department of Missouri. These were general in their scope, rather indicating what it was desirable to accomplish, and pointing out certain principles of government and administration, than going into details which had been matters of oral discussion between him and these officers. A brief extract from the letter to General Buell, of the date November 7, will give an impression of their spirit and purpose:--
It is possible that the conduct of our political affairs in Kentucky is more important than that of our military operations. I certainly cannot overestimate the importance of the former: You will please constantly to bear in mind the precise issue for which we are fighting: that issue is the preservation of the Union, and the restoration of the full authority of the General Government over all portions of our territory. We shall most readily suppress this rebellion and restore the authority of the Government by religiously respecting the constitutional rights of all. I know that I express the feelings and opinions of the President when I say that we are fighting only to preserve the integrity of the Union and the constitutional authority of the General Government.