On the 4th of February I visited General McPherson, and remained with him several days. The work had not progressed so far as to admit the water from the river into the lake, but the troops had succeeded in drawing a small steamer, of probably not over thirty tons' capacity, from the river into the lake. With this we were able to explore the lake and bayou as far as cleared. I saw then that there was scarcely a chance of this ever becoming a practicable route for moving troops through an enemy's country. The distance from Lake Providence to the point where vessels going by that route would enter the Mississippi again, is about four hundred and seventy miles by the main river. The distance would probably be greater by the tortuous bayous through which this new route would carry us. The enemy held Port Hudson, below where the Red River debouches, and all the Mississippi above to Vicksburg. The Red River, Washita and Tensas were, as has been said, all navigable streams, on which the enemy could throw small bodies of men to obstruct our passage and pick off our troops with their sharpshooters. I let the work go on, believing employment was better than idleness for the men. Then, too, it served as a cover for other efforts which gave a better prospect of success. This work was abandoned after the canal proved a failure.
Lieutenant-Colonel Wilson of my staff was sent to Helena, Arkansas, to examine and open a way through Moon Lake and the Yazoo Pass if possible. Formerly there was a route by way of an inlet from the Mississippi River into Moon Lake, a mile east of the river, thence east through Yazoo Pass to Coldwater, along the latter to the Tallahatchie, which joins the Yallabusha about two hundred and fifty miles below Moon Lake and forms the Yazoo River. These were formerly navigated by steamers trading with the rich plantations along their banks; but the State of Mississippi had built a strong levee across the inlet some years before, leaving the only entrance for vessels into this rich region the one by way of the mouth of the Yazoo several hundreds of miles below.
On the 2d of February this dam, or levee, was cut. The river being high the rush of water through the cut was so great that in a very short time the entire obstruction was washed away. The bayous were soon filled and much of the country was overflowed.
This pass leaves the Mississippi River but a few miles below Helena. On the 24th General Ross, with his brigade of about 4,500 men on transports, moved into this new water-way. The rebels had obstructed the navigation of Yazoo Pass and the Coldwater by felling trees into them. Much of the timber in this region being of greater specific gravity than water, and being of great size, their removal was a matter of great labor; but it was finally accomplished, and on the 11th of March Ross found himself, accompanied by two gunboats under the command of Lieutenant-Commander Watson Smith, confronting a fortification at Greenwood, where the Tallahatchie and Yallabusha unite and the Yazoo begins. The bends of the rivers are such at this point as to almost form an island, scarcely above water at that stage of the river. This island was fortified and manned. It was named Fort Pemberton after the commander at Vicksburg. No land approach was accessible. The troops, therefore, could render no assistance towards an assault further than to establish a battery on a little piece of ground which was discovered above water. The gunboats, however, attacked on the 11th and again on the 13th of March. Both efforts were failures and were not renewed. One gunboat was disabled and we lost six men killed and twenty-five wounded. The loss of the enemy was less.