Captain Denham, Royal Navy, now prosecuting a scientific voyage, recently read a paper at the Royal Society, in which the deepest sounding of the ocean ever made was recorded. On the passage from Rio de Janeiro to the Cape of Good Hope, in 36, 49, south latitude, and 27, 6, west longitude, on a calm day, the ocean was ascertained to be 7,706 fathoms deep, or 7 7 geographical miles. C. L. Chatten, Esq., of Camden, S. C, will please accept our thanks for a barrel of delicious sweet potatoes received from him a few days since. They came in good condition and were excellent specimens of South Carolina growth.