... the Potomac. He was about to cross the river in pursuit when, learning that Shields and Fremont (in response to that famous order of Mr. Lincoln's) were hastening to form a juncture in his rear at Strasburg , he marched sixty miles in a day and a half (one of his brigades marched fifty-two miles in one day), held Fremont back with one hand and Shields with the other, until all of his troops and trains ha...