CINCINNATI, December 4, 1862.

Colonel LEWIS D. CAMPBELL, having been duly sworn by the judge-advocate, testified as follows:

By the JUDGE-ADVOCATE:

Question. What is your position in the Army?

I am not in the service now.

Question. State what was your position while in the Army during service in Tennessee and Kentucky.

I was colonel of the Sixty-ninth Ohio Volunteer Infantry. I organized the regiment, and was ordered in April last, after it was mustered in the service, to report to General Buell in Nashville. It was in the later part of April that we marched to Nashville. I arrived there, and not finding his assistant adjutant [general] there I reported to General Dumont, who was in Nashville at the time. I was ordered by him to go into camp, and in the course of two or three days I received an order directing me to distribute my regiment on the line from Nashville to the Duck River, near Columbia, extending over some 40 miles, at five different posts, subsequently six posts, and make my headquarters at Franklin, Tenn. I had distributed my regiment in accordance with the order. Subsequently General Negley ordered a company to be taken and stationed at Duck River. General Dumont approved of it.

Question. Where were you at the time General Bragg invaded Kentucky and how long did you remain with the army after that?

I was with the army after the 9th of August. I was in Nashville on the 8th, when I resigned, intending to return within a week, but the railroad communications were cut off by the guerrillas in the neighborhood of Gallatin, and I was not able to go home without the risk of being captured. I remained in Nashville until the army came north. This was on the 7th of September.

Question. Can you state the position east of Nashville which Bragg's army occupied when he invaded Kentucky?

I cannot state it definitely. On Sunday, the 7th of September, General Crittenden and other officers came to my room, and in the course of conversation I expressed great anxiety to come home, but at the same time would like to have some opportunity of participating in what was then an expected battle. General Crittenden invited me to go with him, and I made arrangements with him on the march to act as his volunteer aide in the event I made arrangements with him on the march to act as his volunteer aide in the event of a battle. On that evening (Sunday, September 9), in company with General Crittenden and staff, we crossed the Cumberland at Nashville and came out within 4 or 5 miles on the Gallatin road, and remained there all night. I came through with Crittenden all the way until we came to Salt River, about 18 miles south of Louisville. As it was then, the general thought that there would be no engagement.

With the permission of General Crittenden I came with his brother to Louisville, and left the divisions of Generals Crittenden and Wood at West Point. I was not with the army after that.

Question. What time was it understood that Bragg had advanced into Kentucky east of Nashville?

I think the first I heard of it was about from the 1st to the 5th of September. I am not quite positive, but I think it was about that time. I cannot name the day within any certainty.

We heard that Bragg was crossing the Cumberland River and was up in the neighborhood of Hartsville or in that direction. That place had been regarded as the headquarters of the guerrillas at the time Colonel Boone was captured and at the time General Johnson had surrendered. Lieutenant Holliday was captured at Tyree Springs and taken to headquarters and then paroled. He represented that there was a formidable force of rebels at that point. My inducement to go with General Crittenden was the assurance which I had from him privately that to go with General Crittenden was the assurance which I had from him privately that to go with the army would be the safest way to return home. He expressed the opinion very strongly that there would be an engagement between the contending forces before many days. As I had gone into Tennessee with a view of assisting there I was anxious before I went home to participate in a fight.

Question. Did the subsequent information confirm you in the fact that the Confederate army had approached?