The capture of Arkansas Post.
Arkansas Post, which is reported in the Northern papers to have been captured by the Federal fleet and land forces, is on White river, about 100 miles from its mouth. It is a square fort, with bastions, mounting four 52 pounders, smooth bore, and one 100 pound Parrott gun. It is not likely that the force of Confederates there approximated even 5,000 men, the lowest figure at which the Federal reports place the number of captured men — The fleet under Porter, which made the attack, was backed by a land force, under McClernand, which seems to have gotten in rear of the fort, as the Federals report that their loss--two hundred--was chiefly caused by the shell from their own gunboats. The Post was attacked on the evening of the 10th and surrendered on the 11th. The report says that the Confederates were out off from retreat on both sides of the river. The dispatches containing all this information are the first published in the Yankee journals, and the facts will doubtless be greatly altered when the truth is known. Another fleet went up the Arkansas river at the same time this one went up the White, but has not yet been heard from.
