DETROIT, July 31, 1862. _Hon. E. M. Stanton, Secretary of War._ SIR: There is a fine company of ninety-five splendid men guarding _three rebel prisoners_ at Mackinac. Would it not be well to put those rascals in some tobacco warehouse or jail and send these troops where they are needed? General Terry would like a command in some other division than the one he is in. Can you not accommodate him? The soldiers at Mackinac are anxious for active service and are well drilled. Very truly yours, Z. CHANDLER. DETROIT, Aug. 9, 1862. _Adjutant-General Thomas._ DEAR SIR: Are the boys of the Michigan First (Bull Run prisoners) exchanged yet? I promised them it should be done at once, and now find them enlisting again under the supposition that it has been done. The list is with the Secretary of War. Our quota is full, and our blood is up. They were yesterday paying $10 for a chance to enter some of the regiments. Very truly yours, Z. CHANDLER. DETROIT, Aug. 28, 1862. _Hon. Wm. A. Howard._ DEAR SIR: Will you say from me to the Secretary of War that I deem it of vital importance that some one be authorized to open and examine rebel correspondence passing through the Detroit postoffice? Mr. Smith (of the postoffice) informs me that letters come through directed to rebels at Windsor. Truly yours, Z. CHANDLER. DETROIT, Nov. 15, 1863. _Hon. E. M. Stanton, Secretary of War._