...n the Union lines below. The night was dark, the rain fell in torrents, and the cloaks of the men were stiffened with sleet, but the column spurred on at full speed. Sad to say. the advance, with Colonel Dahlgren , became separated from the main body, and at dawn of Wednesday he found himself, with a little party of seventy men, in the very midst of a hostile country. Still holding on the swift tenor of hi...