Cavalry.As Stuart threatened Washington, so Kilpatrick in turn threatened the Capital of the South. He was accompanied by Colonel Ulric Dahlgren who was to leave him near Spotsylvania with five hundred picked men, to cross the James, enter Richmond on the south side, after liberating the prisoners at Belle Isle, and unite with Kilpatrick's main force March 1, 1864. The latter left Stevensburg with four thousand cavalry and a battery of horse artillery on the night of Sunday, the 28th of February, crossed the Rapidan at Ely's Ford, surprised and captured the picket there, and marched rapidly toward Richmond. On March 1st the column was within five miles of the city. Failing to connect with Dahlgren, Kilpatrick finally withdrew, but not until he had driven in the force sent to oppose him to the inner lines of the Richmond defenses. This was the nearest that any body of Union troops got to Richmond before its fall. Colonel Dahlgren met his death upon this raid, and part of his command was captured, the rest escaping to Kilpatrick, March 2d, at Tunstall's Station, near White House.