Tlití occurrence of another disaster to the Lnko ftnperior line of steamers was announcud ou Saluvday tnorning hy the following telegram : Special D!;palcli to the Detroit Free I'ross' Poetaue Lake, tito. M abquette, Aii. 19. Tho gteamer Tratelor was burned at the doek t Eigle Harbor, Lake Huprrior, yesterday. No lives lost-. A mail portioa of tlie ireight and furnituro WAs saved, The steauier is a total loss. JOHN FRAZER, Masler Ötearaei' Cornet A dispateh to John Ilutchings, owner of tho boat, says that tho firo bx-okeout in her hold and spread with Buch rapidi ty that very littlo cotild be saved. Tho Travekr was odo ol tho oldest boats in thü Lake áuperior line, and was of 600 tona burthen. She was built at New port in 1853, and subsequemly ca ui e into the possession of the Chicago and Milwaukee Kailroad Company. She was purchased by Mr. Hutchiners in 18C2,"and rebuilt in 1803. She has run regularly for the last three soasons, los ing only one trip. She waa valned at $40,000, and was insured for $20,000 in throo companios.