Fugitive slaves will, under no pretext whatever, be permitted to reside or in any way harbored in quarters and camps of troops serving in this Department. Neither will such slaves be allowed to accompany troops on the march. Commanders of troops will be held responsible for the strict observance of this order. By order of BRIG-GEN. MANSFIELD. In a few days after receiving this order, I was informed that a colored man had come inside of my lines who did not belong to the camp, and in accordance with the above I ordered the officer of the day to send the man outside the lines, as I should have done to any white man, or any person there without permission. A correspondent of the _Traveller_, from the First Massachusetts Regiment, wrote a most pitiful and affecting story regarding it, but I can only say in reply that his statement was _incorrect_ in nearly every particular. On the 29th of June, I received a letter from Hon. Charles Sumner, requesting me to call at his office in Washington, which I did, and on arriving there was presented by him with a letter from Gov. Andrew, of which the following is a copy:-- COMMONWEALTH OF MASSACHUSETTS. _Executive Department, Boston, June 27, 1861._ COL. ROBERT COWDIN:-- MY DEAR SIR: I am compelled earnestly and emphatically, though with entire friendliness, to call upon you, without delay, to resign your commission as Colonel of the First Massachusetts Regiment. The testimony is so unanimous and constant and overwhelming that the Regiment has suffered every day, for want of competent management, that I am compelled to this step, which I take with the utmost regret. Yours very truly, J. A. ANDREW. I inquired of Mr. Sumner what it all meant, and he informed me that the Governor was very much dissatisfied with me, and had written to him and Senator Wilson, asking them to urge my resignation. I told him I was then an officer in the United States service, and that if the Governor, or any one else, had any charge to prefer against me to present them to proper authorities, and I would willingly be tried by a court-martial and abide the result without a murmur. I then returned to camp, and wrote to Gov. Andrew, in substance, what I had stated to Mr. Sumner, and that I should _not_ resign.