The Mormons—A Battle, intelligence was received at St. Louis, and publish-ed there on Monday of last week, that the Mormons and their enemies had at last come to blows. We publish the account as given in the Republican, which journal, however, intimates that it may reasonably be doubted until farther advices:—BATTLE AT NAUVOO.—By the steamer Ocean Wave, which arrived here yesterday morning, we learn that a messenger arrived at Warsaw about 11 o'clock on Friday evening, a few minutes before she left, who said that a battle had taken place about 3 o'clock that afternoon, near Nauvoo, which lasted two hours, and in which from twelve to fifteen men were killed and wounded. The particulars, so far as could be ascertained, are, that on Friday the Nauvooites, hearing that the anti-Mormons were on the march to their city, marched out to the number of from three to five hundred, and posted themselves at the distance of about one mile East of the Temple, having an open plain in front, and an extensive corn field in the rear, their line being formed near and parallel with the fence. Here they waited the approach of the anties, who arrived about 3 o'clock in the afternoon, said to be eight hundred in number, with five or six pieces of cannon. The latter were posted on an eminence, and opened their fire on the Mormons, but at too great a distance to be effective. Soon after the action was continued with small arms, and lasted until 5 o'clock, when the anties cither retreated or withdrew. Their loss is stated to be from eight to fifteen killed, but that is un-certain, and the Nauvooites had one man killed and two wounded; the latter had no cannon. It was ex-pected that the battle would be resumed the same evening, or on the following morning.