The Mandiore lake is fifteen miles in extent, and has more than one channel to the Paraguay, the northernmost of which separates the serra of Doirados from that of Chaynez, and is twenty miles south of Gahiba, in front of which the river St. Lourenço discharges its abundant waters, in the latitude of 18° 45´. The serra of Chaynez, inhabited at times by the Guanan Indians, is followed by that of Albuquerque, which is a square mass of an elevated range from thirty-five to forty miles. On its southern side is situated the prezidio from which its name is derived. In front of this serra is the principal embouchure of the Tocoary in 19° 15´. Eighteen miles further to the south are the mouths of the Mondego. The Paraguay flows in these parts divided into two channels, formed by a narrow island seventy miles long; the eastern channel is denominated Paraguay Mirim. Thirty-five miles to the south of the Mondego are two high mounts, one in front of the other, upon the margins of the Paraguay. Upon the southern skirt of the western mount is situated the before-mentioned fort of Nova Coimbra. Thirty-five miles below Coimbra, on the same margin, is the mouth of the outlet from Bahia Negra, (Black Bay,) which is twenty miles inland, and comprises eighteen in length from north to south, being the receptacle of the lakes, and of the aqueous effusions of the plains lying to the west and south of the Albuquerque mountains. Sixty miles further the Paraguay receives on the eastern bank the Queyma, which is said to be the Terrery of the first certanistas.