A Ship on Fire Sighted by the Westernland and Bark Ringdove. LONDON, March 5. - The Belgian steamer Westernland, Capt. Weyer, at Antwerp from New-York, reports: Feb. 27, in latitude 47° north, longitude 26° west, sighted a dismasted vessel on fire. All of her boats were gone. She was probably a three-masted wooden craft. The Dutch steamer La FIandre, Capt. Leenaers, from New-York Feb, 11, which arrived at Antwerp March 3, reports having had a tempestuous passage. On Feb. 18 a leak was discovered under the engines. Temporary repairs were made, but it was found necessary to keep the pumps going constantly in order to clear her.