Cairo, Jan. 17. The mail boat Storm arrived this raorning with the foüowing additional iteins oí' news conoeniing the recent capture of Arkansas Post : The action began Friday noon and continued until Sunday afternoou. The gunboats Benton, Louisville, Mound City, Iudiauola aad Tyler were engaged. The enomy made a gallant defence, but their guns were disinounted so fast tliat they were finally compelled to surrender. It íippears tüat the arruy took no part in the fight. Eight rebel regimenté) were taken prisouers, including two that liad just arrived to reinforce the garrison. The loss is Dot so great as reported. Three persons were killed on the Louisville, by shots whieh carne through the portholes. The Ohilicothe arrived after tbe capture. At the samo time tho Benton stai-ted up the river to ascertain if the fleet oould ascend. It is thought the rebels have other batteries erccted along the river, and, as there is plenty of water, we míiy hear of other eng;igemonts. When the Storm reached the mouth of the White River, on her way up, those on board hoard firing as if ifroin heavy guns. The correspondent of the Mobile Register, writing from Viokburg, saya four of the five stands of eolors captured yesterday were displayed in f, out of General Smith's headquarters last ! ing. One belonged to the Twenty-ninth Missouri. This was bloody, and must have been in the hottest of the fight. - Another beloning to the Fifty eiglith Ohio was badly torn, a shell having passed through the centre ; another oi ilie Tliirteenth Illinois, was badly mangled. Anothor of the Thirty-first Missouri, was uninjured. All the boats at Mcmphis on Thursday were awaiting government orders. Two hundred and fifty prisoners arrived to-day from Louisviile, making about 1.900 here now. They will be sent South to be exchancd. Dispatch to the Associated Press. Mcmphis, Jan. 14. The fo'lowing dispatch is just reeeived: To M.ij. Gen. II. W. Halleck, General-in-Chief: Hkadquartke's Akmy of the JIississippi.J Post of Ahkansas, Jan. 14. To 5Iaj.-Gen. Grant, Commanding Department of Tenncssee : I have the honor to report that the forces nader my comtaand attacked the post of Arkansas to-day. Having stormed the enemy's works we took a large number of prisoners, variously estimated at from 7.UO0 to 10,000 togethcr with all his stores, animáis, and munitions of war. Rear Admiral David D. Porter, comtnand.ng the Mississippi squadron, effeetively and brilliantly cooperated, accomplishino; this complete success.