DEFENSES NORTH OF THE POTOMAC.*

Lieutenant Colonel JOSEPH A. HASKIN.

First Brigade.

Colonel AUGUSTUS A. GIBSON.

2nd Pennsylvania Heavy Artilley, Colonel Augustus A. Gibson.

1st Vermont Heavy Artillery, Colonel James M. warner.

Second Brigade.

Colonel LEWIS O. MORRIS.

1st Maine Heavy Artillery, Colonel Daniel Chaplin.

7th New York Heavy Artillery, Colonel Lewis O. Morris.

9th New York Heavy Artillery, Colonel Joseph Welling.

9th New York Battery, Captain Emil Schubert.

Third Brigade.

Colonel ALEXANDER PIPER.

9th New York heavy Artillery, 2nd Battalion, + Major Edward P. Taft.

10th new York Heavy Artillery, Colonel Alexander Piper.

Provisional Brigades.

Major General SILAS CASEY.

[No troops.]

DEFENSES SOUTH OF THE POTOMAC.++

Brigadier General GIUSTAVUS A. DE RUSSY.

First brigade.

Colonel THOMAS R. TANNATT.

1st Massachusetts Heavy Artillery, Colonel Thomas R. Tannatt.

2nd New york heavy Artillery, Colonel Joseph N. G. Whistler.

Second Brigade.

Colonel HENRY L. ABBOT.

1st Connecticut Heavy Artillery, Colonel Henry L. Abbot.

2nd Connecticut heavy Artillery, Lieutenant Colonel Elisha S. Kellogg.

Third Brigade.

Colonel JOHN C. TIDBALL.

4th New York Heavy Artillery, Colonel John C. Tidball.

16th New York Cavalry, Company D, Captain A. Livingston Washburne.

Fourth brigade.

Colonel LOUIS SCHIRMER.

15th New York Heavy Artillery, Colonel Louis Schirmer.

Wisconsin heavy Artillery, Company A, Major Charles C. Meservey.

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*Troops at advance Battery and Forts Baker, Bunker Hill, Reno, Simmons, Slocum, and Sumner.

+At Fort Foote.

++Headquarters at Arlington; troops at Batteries Garesche and Rodgers, and at Forst Albany, Barnard, Bennett, Berry, cass, Corcoran, craig, Ellsworth, Ethan Allen, farnsworth, Haggerty, Lyon, marcy, O'Rorke, Reynolds, Richardson, Runyon, C. F. Smith, Strong, Tillinghast, Ward, Weed, Whipple, Willard, Williams, Woodbury, and Worth.

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39 R R-VOL XXIX, PT II