FOURTH CORPS. GEN. KEYES. _Cavalry._ COUCH'S DIVISION. _Artillery._ McCarthy's Battery "C" 1st Penn. 4 10-pds. Parrott guns. Flood's " "D" 1st " 6 " " " Miller's " "E" 1st " 4 Napoleon " Brady's " "F" 1st " 4 10-pds. Parrott " _Infantry._ _Graham's[85] Brigade._ 67th N. Y. Vols. (1st L. I.) 65th " " (1st U. S. Chas.) 23d Penn. " 31st " " 61st " " [Footnote 85: In General McClellan's report of the battle of Fair Oaks, he calls this brigade "Abercrombie's,"--evidently a mistake.] _Peck's Brigade._ 98th Penn. Vols. 102d " " 93d " " 62d N. Y. " 55th " " _Devens's Brig._ 2d R. I. Vols. 7th Mass. " 10th " " 36th N. Y. " SMITH'S DIVISION. _Artillery._ Ayre's Battery "F" 5th U. S. 6 { 4 10-pds. Parrott } guns { 2 Napoleon } Mott's " 3d N. Y. Battery 6 { 4 10-pds. Parrott } " { 2 Napoleon } Wheeler's " "E" 1st N. Y. 4 3-in. ordnance " Kennedy's " 1st N. Y. Battery 6 " " " _Infantry._ _Hancock's Brigade._ 5th Wis. Vols. 49th Penn. " 43d N. Y. " 6th Maine " _Brooks's Brigade._ 2d Vermont Vols. 3d " " 4th " " 5th " " 6th " " _Davidson's Brigade._ 33d N. Y. Vols. 77th " " 49th " " 7th Maine " CASEY'S DIVISION. _Artillery._ Regan's Battery 7th N. Y. Battery 6 3-in. ordnance guns. Fitch's " 8th " " 6 " " " Bates's " "A" 1st N. Y. Art'y 6 Napoleon " Spratt's " "H" 1st " " 4 3-in. ordnance " _Infantry._ _Wessel's Brigade._ 85th Penn. Vols. 101st " " 103d " " 96th N. Y. " _Palmer's Brigade._ 85th N. Y. Vols. 98th " " 92d " " 81st " " 93d " " _Naglee's Brigade._ 104th Penn. Vols. 52d " " 56th N. Y. " 100th " " 11th Maine " PROVOST GUARD. 2nd U. S. Cavalry. Battalion 8th and 17th U. S. Infantry. AT GENERAL HEAD-QUARTERS. 2 Cos. 4th U. S. Cavalry. 1 Co. Oneida Cav. (N. Y. Vols.) 1 Co. Sturgis Rifles (Ill. Vols.) FIRST CORPS. GEN. McDOWELL. _Cavalry._ 1st New York Cavalry. 2d " " 4th New York Cavalry. 1st Pennsylvania " _Sharpshooters._ 2d Regiment Berdan's Sharpshooters. FRANKLIN'S DIVISION. _Artillery._ Platt's Battery "D" 2d U. S. 6 Napoleon guns. Porter's " "A" Mass. 6 { 4 10-pds. Parrott } guns. { 2 12-pds Howitzers } Hexamer's " "A" N. J. 6 { 4 10-pds. Parrott } " { 2 12-pds Howitzers } Wilson's " "F" 1st N. Y. Art'y 4 3-in. ordnance " _Infantry._ _Kearny's[86] Brigade._