It must be of commercial interest to read the following account of a passage through the Straits of Magellan, performed by Capt. J. Longmuir of the British bark Cape Horn. "On the 16th of November, at 8, P. M., the Evangelists bore N. N. E. 5 miles; at midnight, Cape Pillar bore S. S. W 3 miles. The 17th, at noon, we entered "crooked reach" ; 10 P. M., off Port Famine. The 18th, at 4.30, P. M., came to in Gregory's Bay ; good holding ground; 19, at 3.30, A. M., got under way; 7.30, A. M. entered the first narrows, last half flood. At noon we were clear of Straits. And now, after the experience of four voyages around Cape Horn -- in Sept. 1843, Aug. 1844, and Aug. 1845 -- l must say, considering the wear and tear the vessels then received, the weather encountered, and the heavy cross seas prevalent between the Straits and the Cape, there is no comparison between the passage around and that through Magellan, from the west coast. Had I another passage to make at the same season, or in winter with moonlight, I would altogether prefer the Straits to the Cape Horn passage. By this, you see we accomplished the passage in 60 hours, and out of that lay 12 hours at anchor." -- [Neighbor, Valparaiso, April, 27.