The Confederates surrendered to Grant on the 16th. It was an army victory. Nashville fell on the 25th, and on March 1st the Confederates began to evacuate Columbus, on the Mississippi. No attempt was made by the Confederates to hold Hickman, the next town down the Mississippi, but they fortified Island No. 10, that lay in the river opposite the dividing line between Kentucky and Tennessee, and both banks of the river. The position there was particularly strong. The river, for some distance, flowed south until the island was reached, and then turned to the northwest, and sweeping around a horseshoe bend, came back again to its old line and continued on south. The island lay right in the pocket of the sharp bend where the river turned to the northwest. The current was strong and full of eddies, and the channel lay right under the muzzles of the guns that were placed to defend it. “On the island itself were four batteries mounting twenty-three guns, on the Tennessee shore six batteries mounting thirty-two guns. There was also a floating battery, which, at the beginning of operations, was moored abreast the middle of the island, and is variously reported as carrying nine or ten IX-inch guns.” So says Mahan. Nevertheless, the Union forces were sweeping down, and this stronghold had to yield, and the most interesting fact in connection with its capture was the brave dash of an American sailor, Captain Walke of the _Carondelet_. Pope captured New Madrid, on the Missouri side of the river, on March 3d, and began fortifying the river below that town. A glance at the map will show this necessarily cut off river communications between Island No. 10 and the Confederates down stream. But the Confederates could come to Tiptonville, and from that place a good road led across the neck of land three miles to the shore opposite Island No. 10, and that was but a small overland journey for supplies. However, supplies could come by no other route, because the region east of the island was one vast swamp. Accordingly Pope determined to cross over to Tiptonville and so shut the Confederates in. Meantime Foote’s flotilla had arrived in the river just above Island No. 10, bringing along a number of mortar boats--mere floating platforms carrying a thirteen-inch mortar each. Pope soon sent to Foote, asking that a couple of the gunboats be sent down the river, on the first favorable night, past the Confederate batteries to New Madrid to serve as ferryboats for the troops and to cover the landing. To this request Foote sent a positive refusal, although Capt. Henry Walke, of the _Carondelet_, was urgent in asking permission to make the run. Foote said that the risk was too great, and he could not afford to lose even one ship from his present command. But he added that when “the object of running the blockade becomes adequate to the risk,” he would consent. [Illustration: Iron Bluffs. Chalk Bluffs. U. S. Flotilla Descending the Mississippi River.