...f it,--and I have no time to add comments, as this hasty letter must be sent at once by a special messenger, who may reach Washington in time for the four and a half o'clock mail to-morrow morning. General McDowell , who had been to visit the other column, came up just as the engagement was over. I believe he says the existence of this battery was well known, and that the men ought not to have been sent agains...