_Fort Hindman_, Arkansas River.—A quadrangular earthwork, mounting 10 guns, two of the heaviest being in armored casemates. At 5 p.m. of the 10th, the Louisville, De Kalb, and Cincinnati moved up in line abreast to within 400 yards and opened fire. As soon as the fire of the forts slackened the Lexington and Black Hawk moved up and opened with shrapnel, while the Rattler passed up the river and took the fort in enfilade. Ceased firing and drew out of action at dark. In the morning the attack was renewed in the same manner, and the fort surrendered in four hours. Casualties, 5 killed, 23 wounded. The two casemates were completely shattered and every gun dismounted. _Earthworks at Grand Gulf, April 29, 1863._ FEDERAL. IRON-CLAD GUN-BOATS. Guns. Louisville 13 Carondelet 13 Mound City 13 Pittsburg 13 Tuscumbia 5 Benton 16 Lafayette 6 CONFEDERATE. _Grand Gulf Batteries_, Mississippi.—Consisting of one fort 75 feet high, mounting four heavy rifles, and one fort farther down the river mounting four heavy rifles. The Louisville, Carondelet, Mound City, and Pittsburg moved down in line ahead and attacked the lower battery, silencing it an hour, and then moved up to the support of other vessels against the upper one. The action continued five hours and a half, and the batteries being silenced the flotilla drew out of action, expecting the army to assault and take possession. This was not done, and the next day the flotilla was ordered to attack again. The batteries were both found deserted and the guns spiked, except three which had been dismounted by the firing. Casualties: Lafayette, 1 wounded; Benton, 7 killed, 12 wounded; Louisville, none; Tuscumbia, 5 killed, 24 wounded; Mound City, none; Carondelet, none; Pittsburg, 6 killed, 12 wounded. The Benton was hit 47 times; 12 shots pierced the ⅝-inch armor, 4 shots pierced the 2½-inch casemate armor, and 1 shot pierced the 1½-inch armor of the pilot-house. Louisville hit 7 times, Tuscumbia 81 times, Pittsburg 35 times. _Earthworks at Simonoseki, July 11, 16, and 20, 1863, and September 5, 1864._ These attacks were made by vessels of different nationalities on a series of earthworks lining the narrow straits of Simonoseki, Japan. July 11, the Dutch corvette Medusa entered the straits, and being fired at opened fire on the batteries at a distance of 1200 yards. The action continued one hour, when the Medusa drew out without having silenced the batteries. Casualties, 4 killed, 5 wounded. On the 10th, the United States corvette Wyoming entered the straits, and on being fired at opened a return fire. Passing between two sailing gun-boats on one side and a steam gun-boat on the other at pistol-shot distance, she gave them both broadsides, sinking the sailing vessels and blowing up the boiler of the steamer. Action continued an hour and a half, when the Wyoming drew out without silencing the batteries. Casualties, 4 killed, 7 wounded.