The Slave Trade, published in St. Albans, VT. March 8 1860 The New York Times has a correspondent on board the United States sloop of war Portsmouth, who writes as follows from St. Paul de Loando, Dec. 20: "The few months experience we have had on the coast has not altogether been thrown away. It has thoroughly convinced us that the whole slave coast is, we may say, lined with slavers, who are generally from New York, cleared from the Custom House, bringing all the appliances of the trade with them, and maneuvering about on the coast, under various pretenses and disguises of legal traffic; particularly under that most specious blind - the obtaining palm oil - until the favorable moment having arrived, the cargo is shipped, and a few hours find them out of danger, on their way to the West Indies." The writer gives only three specific cases, however, in support of his sweeping assertion, and all of them have been already reported - the Travernier, the Bell and the Orion. Connected with these some additional facts, however, are given. The Travernier was captured by a British cruiser, the Viper and sent to St. Helena. When captured she had on board six hundred slaves. Most of them were from eight to sixteen years old; some were, women, all were naked. When visited by the officers of the Portsmouth, although the slaves were then in a better condition than when captured, some were dying and nearly all weresick. The writer states that when opthalmia broke out among the miserable Africans, every new case was thrown over-board, under the supposition that the disease is contagious.