The city lies on the south bank of the Rappahannock, which here makes a considerable bend nearly southward; and along the northern bank, opposite, extends a range of hills which command the city and the level ground around it.  South of the river the land is low, but from the depth of the channel forms a line of bluffs, affording good shelter to troops after crossing to assail a force beyond.  The only good position for such a force, standing on the defensive, is a range of hills hemming in the level ground.  This range begins near the western suburbs of the city, where it is called “Marye’s Hill,” and sweeps round to the southward, gradually receding from the stream, until, at Hamilton’s Crossing, on the Richmond and Potomac Railroad, a mile or more from the river, it suddenly subsides into the plain.  This plain extends to the right, and is bounded by the deep and difficult channel of Massaponnax Creek.  As Marye’s Hill is the natural position for the left of an army posted to defend Fredericksburg, the crest above Hamilton’s Crossing is the natural position for the right of such a line, care being taken to cover the extreme right with artillery, to obstruct the passage of the ground between the crest and the Massaponnax.

[Illustration:  Map—­Battle of Fredericksburg.]

Behind the hills on the north side General Burnside’s army was posted, having the railroad to Aquia Creek for the transportation of their supplies.  On the range of hills which we have described south of the city, General Lee was stationed, the same railroad connecting him with Richmond.  Longstreet’s corps composed his left wing, and extended from Marye’s Hill to about the middle of the range of hills.  There Jackson’s line began, forming the right wing, and extending to the termination of the range at Hamilton’s Crossing.  On Jackson’s right, to guard the plain reaching to the Massaponnax, Stuart was posted with cavalry and artillery.

The numbers of the adversaries at Fredericksburg can be stated with accuracy upon one side, but not upon the other.  General Lee’s force may be said to have been, in round numbers, about fifty thousand of all arms.  It could scarcely have exceeded that, unless he received heavy reenforcements after Sharpsburg; and the present writer has never heard or read that he received reenforcements of any description.  The number, fifty thousand, thus seems to have been the full amount of the army.  That of General Burnside’s forces seems to have been considerably larger.  The Federal army consisted of the First, Second, Third, Fifth, Sixth, Ninth, and Eleventh Corps; the latter a corps of reserve and large.  If these had been recruited to the full number reported by General McClellan at Sharpsburg, and the additional troops (Fifth and Eleventh Corps) be estimated, the Federal army must have exceeded one hundred thousand men.  This estimate is borne out by Federal authorities.  “General Franklin,” says a Northern writer, “had now with him about one-half the whole army;” and General Meade says that Franklin’s force “amounted to from fifty-five thousand to sixty thousand men,” which would seem to indicate that the whole army numbered from one hundred and ten thousand to one hundred and twenty thousand men.