Meanwhile, unbeknownst to Sheridan, Robert E. Lee was concerned about the critical road intersection at Old Cold Harbor, only six miles from the Confederate capital of Richmond. He dispatched Brig. Gen. Matthew C. Butler's brigade of 2,000 troopers from Mechanicsville to determine whether the intersection was threatened. Butler took with him the 4th and 5th South Carolina Cavalry regiments from his own brigade (leaving behind 6th South Carolina, which he considered to be too inexperienced) and the small brigade of Brig. Gen. Martin W. Gary, which consisted of only the 7th South Carolina Cavalry. The Confederate cavalrymen departed midmorning on May 30 and arrived near the Barker farm between 1 and 2 p.m.