War of the Rebellion: Serial 006 Page 0213 Chapter XV. CORRESPONDENCE, ETC.-UNION.

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2nd. By way of Stono Inlet and River and James Island, taking Fort Johnston, and leaving Forts Sumter, Moultrie, and Castle Pickney on the right for the time being. We could not occupy Fort Johnston, however, until Sumter had been reduced.

3rd. By way of Bull's Bay, leaving all the forts in the harbor on the left, and taking city in the rear by Wando and Cooper Rivers.

The Bull's Bay project presents the greatest difficulties in the way of land nd water transportation; would probably for other reasons be the most difficult of execution, and I therefore would recommend a principal attack in that direction. A feint there in force would not recommend a principal attack in that direction. A feint there in force would in my principal attack in that direction. A feint there in force would in my opinion very materially second the initial steps of may offensive operations on James Island via Stono River.

At between the other two projects I distinctly favor that by James Island for the following prominent reasons, without going into details, viz:

Firs. The recent blockade of the channels leading into Charleston Harbor by old hulks. Although it will most likely eventuate in opening one good channel for vessel of moderate draught, it will, for some time to come at least, practically exclude any effective co-operation of the Navy in a direct attack from the sea;

Second. The complete success of the first project (by first reducing the forts) would neither give us the possession of Charleston as the objective point a good base of operations, unless we had all of James Island also, while,

Third. If we have James Island we command and can even hold the city, and of course secure all the real advantages which its possession is supposed to confer, even if the in the harbor (that is, Sumter and Moultrie) remain in the hands of the enemy.

Fourt. The attack by James Island would render it necessary for the Navy first to shell out the battery or batteries on Stono Inlet and River, os as to secure to us the undisputed command of those waters up to the first landing place on the island, probably Turbull's. Having a footing on the island, we would have to fight a battle for its possession. I f beaten, a position on the south of the island be maintained against very great odds, even in the absence of any active assistance from the Navy.

It would be equally necessary to fight and gain this battle on James Island in order to hold and occupy Charleston, even if we first captured the harbor per se by deducing the forts by a siege. Once in possession of James Island and holding the sea, the forts fall into our hands in due time as a matter of course. The reduction of Fort Sumter, or even Fort Moultrie, with an investment by water only, is a matter of no small moment.

As an isolated movement, not really second by descent on other important points of this coast, I would the following force sufficient to carry this project by James Island into effect Out knowledge of the extent of the preparations against such an attempt by us is quite meager, and radical modifications of this plan may be necessary so far as it relates to the proportion of the different when a thorough reconnaissance shall have placed us in possession of more facts. I should consider the following as simply a near approximation to what is required, viz: 14,000 infantry, 1,000 cavalry, 12 pieces light artillery (two batteries), 20 siege guns, with a large proportion of 20-pounder and 30-pounder Parrott guns.

Very respectfully, your obedient servant,

Q. A.. GILLMORE,

Captain, and Chief Engineer Expeditionary Corps.