It is now generally conceded that the unknown iour-masted steel snip. with whieh the. British ship Prince Oscar collided July 13 last, in latitude 9.30 sonth, lonpitude 28.20 west, sinkintr her with all hands, is the Lord Downshire, of lielfast, which is commanded by Capt. J. C. McMurray, wellknown at Philadelphia. The Lord Downshire, the stip that is supposed to have been the ill-fated craft, carried a crew ol about 4U men, and all must have been lost.