In a copy of a nautical magazine on board, I saw an account of a singular fact that occurred a short while ago. The British ship “Crompton” was homeward bound a few months since, from Calcutta to Dundee, when one morning Captain Lloyd sighted something ahead which seemed to be either a capsized vessel or the back of a whale. As the vessel approached, however, the captain saw that it was neither, but a rock, about sixty feet long, eight feet high, and the same broad. He could scarcely believe his senses, for the position of the rock was 47° north and 37° 20′ west! Imagine a rock’s existing in the most crowded ocean on the globe, almost every square mile of which it was reasonable that at least one vessel had traversed, which had never been seen or reported before! For some time Captain Lloyd could not believe that it really was a rock, and so to verify it he sailed as close to it as possible; and as the morning was a perfectly clear one, and the hour twenty minutes to eight, he was at last compelled to believe the evidence of his eyes, that here was a large rock, extremely dangerous to navigation, lying five hundred miles north-northwest of the Azores! Speaking of those balmy isles reminds one of that ardent, skilful yachtsman, the Prince of Monaco. About two years ago, while prosecuting some deep-sea soundings in the vicinity of the Azores on his steam yacht, he found a bank or ledge which rose from a depth of about two thousand fathoms to one of something like fifty fathoms, which, like the aforementioned rock, had never been charted or reported. So extremely zealous is the prince in his pursuit of knowledge concerning the floor of the Atlantic, that he shortly afterward gave an order for a twelve-hundred-ton steam yacht (he can well afford it!) fitted with the most recent inventions in connection with deep-sea sounding apparatus. I wonder whether he will use the machine for this purpose invented by Captain Sigsbee, who commanded the battleship “Maine” at the time of her destruction. It is said that Lord Kelvin, who, when Sir William Thompson, invented the famous sounding machine which bears his name, has stated that Captain Sigsbee has adopted an idea in his apparatus which he (Lord Kelvin) had vainly sought for years to utilize in his mechanism. If this be true, Captain Sigsbee has reason to be a very proud man, for Lord Kelvin is, perhaps, the most learned individual now living on hydro-dynamics and kindred sciences. Last voyage it took us exactly a month in which to reach this spot where we are now, which illustrates how uncertain and erratic long voyages are. All fear of being “stuck” in this region, as we were before, has disappeared, for the Trades have come now without question; and while they are quite fresh enough to suit us, we would like to see the wind back two points to the northward. Latitude, 26° 18′ north; longitude, 41° 9′ west. +May 23+