War of the Rebellion: Serial 005 Page 0684 OPERATIONS IN MD., VA., AND W. VA. Chapter XIV.

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works give a security which mere numbers cannot give, and at not a tithe the expense of defense by troops alone..

It is impossible to make anything like a reliable estimate of what additional amount of funds will be required. In a letter to the General-in-Chief commanding Army of Potomac, of December 6, I urged an immediate appropriation of $150,000, and this appropriation has been asked for of Congress by the Secretary of War..

Should the auxiliary works which I have suggested be undertaken and the scar ps be reverted, I believe a larger sum than this may be judiciously expended. I therefore recommend that an additional $100,000, or $250,000 in all, be provided for the continuation and completion of the defenses of Washington. These works acquire new importance if the probability of a foreign war is taken into consideration. In view of this new importance, of the semi-permanent or possibly permanent necessity for such works, it is proper to suggest that early in the spring the scarps be protected by a timber or thin brick revetment, and the exterior and other slopes, where not already done, be sodded, and that wooden caponieres, or counterscarp galleries, be arranged to flank all unflanked ditches-at least of important works. The strengthening of the profiles where necessary has already been mentioned as important..

It remain with me to express my sense of the zeal and efficiency with which the officers of engineers serving with me since April have discharged their duties. To their energy and skill I am mainly indebted for the successful accomplishment of this really great work, and I feel that I have a right to say that for the safety of the capital in the hour of its greatest danger; for saving the cause of established government and the Constitution from the most serious blow the rebels could have inflicted, the country owes much to the labors of the engineers. From their great experience and constant association with me since April the services of Colonels Woodbury and Alexander have been particularly important in the laborious reconnaissances and in directing the execution of extensive lines of works.

General Wright laid out and superintended the construction of Fort Ellsworth, and General Newton, who since the 1st of September until recently had charge of the works below Four Mile Run, laid out and directed the construction of Fort Lyon..

Captains Blunt and Prime, Lieutenants Comstock, Houston, McAlester, Robert, Paine, Cross, Babcock, and Dutton have served with efficiency during the whole or part of these constructions, and the lamented Snyder lost his life from over-zealousness in discharge of his duties while in impaired health from his services at Charleston Harbor and Fort Sumter. Since the relief of Captain Prime, Lieutenant H. L. Abbot, of the Topographical Engineers, has taken his place, proved himself a most energetic and valuable assistant, having completed Fort Scott and built Forts Richardson and Barnard. In carrying out so many works at the same time, and for organizing and managing the large bodies of hired laborers employed, it has been found necessary to call in the aid of civil engineers, not only because the engineer officers were too few to keep proper supervision, but because a large portion of those under my orders have been called off to other duties, such as the organization of bridge trains, the instruction of engineer troops, &c. Civil Engineers Gunnel, Frost, Faber, Childs, and Stone have rendered valuable services; also Mr. (now major of the Fifteenth New York Volunteer Regiment) Magruder. I should also express my warmest acknowledgment to Mr. James Eveleth, of your office, who, as disbursing agent and pay-