And first, of our positions. Let the reader understand that the Pittsburgh Landing is simply a narrow ravine, down which a road passes to the river bank, between high bluffs on either side. There is no town at all--two log huts comprise all the improvements visible. Back from the river is a rolling country, cut up with numerous ravines, partially under cultivation, but perhaps the greater part thickly wooded with some underbrush. The soil clayey, and roads on Sunday morning were good. From the Landing a road leads direct to Corinth, twenty miles distant. A mile or two out, this road forks, one branch is the lower Corinth road, the other the ridge Corinth road. A short distance out another road takes off to the left, crosses Lick Creek, and leads back to the river at Hamburgh, some miles further up. On the right, two separate roads lead off to Purdy, and another, a new one, across Snake Creek to Crump's Landing on the river below. Besides these, the whole country inside our lines is cut up with roads leading to our different camps; and beyond the lines is the most inextricable maze of crossroads, intersecting everything and leading everywhere, in which it was ever my ill-fortune to become entangled. On and between these roads, at distances of from two to four or five miles from Pittsburgh Landing, lay five divisions of Major-General Grant's army that Sunday morning. The advance line was formed by three divisions--Brigadier-General Sherman's, Brigadier-General Prentiss's and Major-General McClernand's. Between these and the Landing lay the two others--Brigadier-General Hurlbut's and Major-General Smith's, commanded, in the absence (from sickness) of that admirable officer, by Brigadier-General W. H. L. Wallace. Our advance line, beginning at the extreme left, was thus formed. On the Hamburgh road, just this side the crossing of Lick Creek and under bluffs on the opposite bank that commanded the position, lay Colonel D. Stuart's Brigade of General Sherman's Division. Some three or four miles distant from this Brigade, on the lower Corinth road and between that and the one to Purdy, lay the remaining Brigades of Sherman's Division, McDowell's forming the extreme right of our whole advance line, Buckland's coming next to it, and Hildebrand's next. To the left of Hildebrand's Brigade, though rather behind a portion of Sherman's line, lay Major-General McClernand's Division, and between it and Stuart's Brigade, already mentioned as forming our extreme left, lay Brigadier-General Prentiss' Division, completing the front. Back of this line, within a mile of the Landing, lay Hurlbut's Division, stretching across the Corinth road, and W. H. L. Wallace's to his right. Such was the position of our troops at Pittsburgh Landing, at daybreak Sunday morning. Major-General Lew. Wallace's Division lay at Crump's Landing, some miles below, and was not ordered up till about half-past seven o'clock that day.