The river Guandu takes its name at the confluence of the St. Anna with the das Lages, the courses of which are in an opposite direction to this point; the first issues from the Organ Mountains, near the heads of the river Piabanha, and runs south-west till it encounters the other, which flows north-east from its origin in the frontier serra of Ilha Grande. The Guandu passes the royal palace (ex-Jesuitical) of St. Cruz, and discharges itself by two mouths into the bay of Marambaya. The early possessors of this part of the country, in order to evitate the damage which they sustained by the inundations of this river, submerging the extensive and fine campinhas (plains) of the southern part, opened a trench of two miles long from it to the small river Taguahy, which runs in a parallel direction, and by this mode discharged the excess of water which the banks of the Guandu could not contain at the period of the floods. The western mouth, or that of Taguahy, is little more than a league distant from the proper one of the Guandu: barks navigate both. The river Mambucâba, which is a fine river, even beyond the point where the tide reaches, issues from the serra of Bocaina, and disembogues in front of the bar of Cayrussu. LAKES.--Lakes are numerous in this province. The principal are situated in the districts of Cape Frio and Goytacazes; many of them are surrounded by marshy lands, and none possess, in any point of view, the attractions peculiar to such diffusions of inland water in Europe. The lake of Jacaré-pagua, or Jaracapauha, is narrow and about four leagues long, parallel with and very near to the beach. It abounds with fish, receives some small streams, and has an outlet to the sea at its eastern extremity. It is situated at the eastern base of the picturesque and lofty mountain of the Gavea, about two leagues to the west of the Sugar-Loaf. At its opposite base is the beautiful and highly pleasing cascades of Tejuca.