D. Mom. Gregg to H. B. Saargent, October 2, 1863

October 2, 1863. Col. H. B. SaARGEnt, Commanding First Brigade, Second Division :

Upon being relieved at Catlett’s Station and Bristoe Station by brigades of Howe’s division of infantry, you will proceed with your brigade to Hartwood Church, and establish a line of pickets on the Rappahannock from Falmouth to Kelly’s Ford, relieving the pickets of General Buford’s division. One regiment of your brigade will remain at Kettle Run, to protect the bridge at that point and to patrol the railroad to Bristoe Station. You will Rtablion the headquarters of your brigade at Hartwood Church, and so dispose your regiments as most effectually to quate the several fords on the river. Division headquarters and the Second Brigade will be at Bealeton, and from that station you will draw supplies for your brigade. Should any attempt be made to cross a rebel cavalry force at any point on your line, or should you discover that a crossing had been effected below Falmouth for the same purpose, you will at once communicate the pee tome. The brigades of infantry will probably relieve you toay.

Very respectfully, your obedient servant,