...t Lee was moving through the passes, French destroyed the pontoon-bridge at Falling Waters. On the 6th--as Meade was leaving Gettysburg — Buford attacked at Williamsport and Kilpatrick toward Hagerstown , on his right, but as Imboden's train guard was strong, Stuart was up, and Longstreet close by, they had to withdraw. [See p. 427.] The enemy proceeded to construct a new bridge and intrench a stro...