War of the Rebellion: Serial 007 Page 0131 Chapter XVII. CAPTURE OF FORT HENRY, TENN.

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navigation of the Tennessee River, and their gunboats are now ascending the river to Florence.

Operations against Fort Donelson, on the Cumberland, are about to be commenced, and that work will soon be attacked.

The slight resistance at Fort Henry indicates that the best open earth-works are not reliable to meet successfully a vigorous attack of iron-clad gunboats, and, although now supported by a considerable force, I think the gunboats of the enemy will probably take Fort Donelson without the necessity of employing their land force in co-operation, as seems to have been done at Fort Henry.

Our force at Fort Donelson, including the force from Fort Henry and three regiments of General Floyd's command, is about 7,000 men, not well armed or drilled, except Heiman's regiment and the regiment of Floyd's command.

General Floyd's command and the force from Hopkinsville is arriving at Clarksville, and can [if necessary] reach Donelson in four hours by steamers, which are there.

Should Fort Donelson be taken, it will open the route to the enemy to Nashville, giving them the means of breaking the bridges and destroying the ferry-boats on the river as far as navigable.

The occurrence of the misfortune of losing the fort will cut off the communication of the force here, under General Hardee, from the south bank of the Cumberland. To avoid the disastrous consequences of such an event I ordered General Hardee yesterday to make [as promptly as it could be done] preparations to fall back to Nashville and cross the river.

The movements of the enemy on my right flank would have made a retrograde in that direction to confront the enemy indispensable in a short time. But the probability of having the passage of this army corps across the Cumberland intercepted by the gunboats of the enemy admits of no delay in making the movement.

Generals Beauregard and Hardee are equally with myself impressed with the necessity of withdrawing our force from this line at once.

With great respect, your obedient servant,

A. S. JOHNSON,

General, C. S. Army.

Honorable J. P. BENJAMIN,

Secretary of War.

No. 6. Report of Lieutenant Colonel Jeremy F. Gilmer, C. S. Army, chief engineer, upon the defense of Fort Henry.

ENGINEER'S OFFICE, Decatur, Ala., March 17, 1862.

COLONEL: In obedience to General Johnston's orders of January 29, received at Nashville, I proceeded the next day to Fort Donelson and thence to Fort Henry, to inspect the works and direct what was necessary to be done at both.

I arrived at Fort Henry the afternoon of the 31st, when I met Brigadier-General Tilghman commanding the defenses on the Tennessee and Cumberland Rivers. By the exertions of the commanding general, aided by Lieutenant Joseph Dixon, his engineers officer, the main fort [a strong