...this point, I inclose a copy of my letter to Admiral Dahlgren, at Charleston, sent him by a fleet steamer from Wilmington on the 25th of April, two days before the bankers of Richmond had imparted to General Halleck the important secret as to Davis' movements, designed, doubtless, to stimulate his troops to march their legs off to catch their treasure for their own use. I know, now, that Admiral Dahlgren did...