“Words are inadequate to express the admiration I feel for the abilities of Lieutenant-Colonel Bailey. This is, without doubt, the best engineering feat ever performed. Under the best circumstances, a private company would not have completed this work under one year, and to an ordinary mind the whole thing would have appeared an impossibility. Leaving out his abilities as an engineer, and the credit he has conferred upon the country, he has saved to the Union a valuable fleet, worth nearly two million of dollars. More, he has deprived the enemy of a triumph which would have emboldened them to carry on the war a year or two longer; for the intended departure of the army was a fixed fact, and there was nothing left for me to do, in case that event occurred, but to destroy every part of the vessels, so that the rebels could make nothing of them. The highest honors the Government can bestow on Colonel Bailey can never repay him for the service he has rendered the country. “To General Banks, personally, I am much indebted for the happy manner in which he has forwarded this enterprise, giving it his whole attention, night and day, scarcely sleeping while the work was going on; tending personally to see that all the requirements of Colonel Bailey were complied with on the instant. “I do not believe there ever was a case where such difficulties were overcome in such a short space of time, and without any preparation. * * * * * “DAVID D. PORTER, Rear-Admiral. “HON. GIDEON WELLES, Sec’y of the Navy, Washington, D. C.” * * * * * The last of the gunboats passed the falls on the 12th of May, and on the next day Alexandria was evacuated. The town was fired in several places by some evil-disposed persons connected with the army, and most of the inhabitants thus reduced to suffering and want. OPERATIONS IN GEORGIA—BATTLE OF TUNNEL HILL. FEBRUARY 22, 1864. While Sherman’s expedition was marching on Meridian, a force of rebels detached from the army of Johnston—who had superseded Bragg—near Dalton, was sent out to reinforce Polk, in Alabama. This caused General Grant to direct a forward movement upon Dalton, which commenced February 22d, and led to severe fighting. On the day specified, a strong column of infantry, preceded by Colonel Harrison’s cavalry, set out from Chattanooga on the road to Tunnel Hill and Dalton. The expedition was under the direction of General Palmer, whose able coadjutors were Generals Johnson, Davis, Baird and Carlin. No opposition was encountered east of the Chickamauga. Colonel Harrison, however, caught sight of some rebel cavalry and chased them through Ringgold’s Gap and Taylor’s Ridge. The enemy’s mounted force, consisting of Tennessee cavalry, had at first fled in confusion, but finally took heart and skirmished with considerable spirit.