Washington, March 20. 1863.
Whom it may concern Whereas it appears to my satisfaction that Thomas W. Knox, a correspondent of the New-York Herald, has been, by the sentence of a Court-Martial, excluded from the Military Department under command of Major General Grant, and also that Gen. Thayer, president of the court Martial which rendered the sentence, and Major General McClernand in command of a corps of that Department, and many other respectable persons, are of opinion that Mr. Knox's offence was technical,