Vicksburg is doubtless very strongly fortified, both against the river and land approaches.

Already the gunboats have secured the Yazoo up for twenty-three miles, to a fort on the Yazoo at Haines's Bluff, giving us a choice for a landing-place at some point up the Yazoo below this fort, or on the island which lies between Vicksburg and the present mouth of the Yazoo.

(See map [b, c, d], Johnson's plantation.) But, before any actual collision with the enemy, I purpose, after our whole land force is rendezvoused at Gaines's Landing, Arkansas, to proceed in order to Milliken's Bend (a), and there dispatch a brigade, without wagons or any incumbrances whatever, to the Vicksburg & Shreveport Railroad (at h and k), to destroy that effectually, and to cut off that fruitful avenue of supply; then to proceed to the mouth of the Yazoo, and, after possessing ourselves of the latest and most authentic information from naval officers now there, to land our whole force on the Mississippi side, and then to reach the point where the Vicksburg & Jackson Railroad crosses the Big Black (f); after which to attack Vicksburg by land, while the gun-boats assail it by water.

It may be necessary (looking to Grant's approach), before attacking Vicksburg, to reduce the battery at Haine's Bluff first, so as to enable some of the lighter gunboats and transports to ascend the Yazoo and communicate with General Grant.

The detailed manner of accomplishing all these results will be communicated in due season, and these general points are only made known at this time, that commanders may study the maps, and also that in the event of non-receipt of orders all may act in perfect concert by following the general movement, unless specially detached.
You all now have the same map, so that no mistakes or confusion need result from different names of localities.