...crossing of the army and train. The cantonments of the enemy here were burned down by order of General Cox. There appears to be quite a Union sentiment here at present. All the way from here to Malden great cheering for the Union was manifested. July 26.--On the evening of the 25th the steamer Economy, with a detachment of men under Major Hines, was sent up the river six miles to Malden, to lo...