"The French have, within the last month, obtained, by fraud, possession of the islands of Johanna, Mohilla, and Peonaro; they had already, by the same means, obtained the islands of Mayotte and Nos Beh. There are at present out here eleven ships of war--the largest a 60-gun frigate; more are expected out, in preparation for the conquest of all Madagascar; and also, it is said, of the coast of Africa, from latitude 10 S. to 2 S.; this portion includes the dominions of the Imaum of Muscat. At this place (Nos Beh) a system of slavery is carried on that you are not aware of. Persons residing here, send over to places on the mainland of Africa, as Mozambique, Angoza, &c., money for the purchase of the slaves; they are bought there for about ten dollars each, and are sold here again for fifteen dollars; here again they are resold to French merchant vessels from Bourbon and St. Mary's for about twenty-five to thirty dollars each. Captains of vessels purchasing these use the precaution of making two or three of the youngest free, and then have them apprenticed to them for a certain term of years, (those on shore,) fourteen and twenty one years. These papers of freedom will answer for many. It is a known fact, that numbers have been taken to Bourbon, and sold for two hundred and three hundred dollars each. Those who have had their freedom granted at this place, (Nos Beh,) as well as others, are chiefly of the Macaw tribe. The Indian, of Havre, a French bark, took several from this place on the 20th of September last; she was bound for the west coast of Madagascar, St. Mary's, and Bourbon. L'Hesione, a 32-gun frigate, has just arrived from Johanna, having compelled one of the chiefs to sign a paper, giving the island up to the French. On their first application, the king and chiefs of Johanna said, that the island belonged to the English. The French then said, that if it was not given up, they would destroy the place; they, after this, obtained the signature of one of the chiefs to a paper giving up the island to the French. "I remain, Sir, &c., &c., "HENRY C. ARC ANGELO. "Supercargo of the late Ghuznee of Bombay. "_Nos Beh, Madagascar_, "_Oct. 6th, 1843._"