...rning by Lockwood's brigade, two regiments from the defences of Baltimore, was at the same time moved to the left, across Rock Creek, and posted, with its right resting on Rock Creek, on the right of Geary 's division of the Twelfth, which, after having been relieved on the left by the Third Corps, had been moved over to join the other division of its own corps. This new line was naturally a very stro...