The river Negro has its origin very near to that of the Ibicui, runs always to the south-west, is enlarged by the receipt of a number of streams, and incorporates itself with the Uruguay five leagues before that river enters the Paraguay, or Plate, after having watered eighty leagues of country, abounding, for the major part, in cattle: its largest confluent is the Hy, which it receives nearly twenty leagues above its mouth, after a course of thirty-six leagues, from east to west, through a country rich in pasturage and cattle. The river St. Luzia takes a course, for nearly forty leagues, through a country similarly abundant, and disembogues four leagues to the west of Monte Video, having received by the right bank, a little higher up, the St. Joze, with which it becomes wide, deep, and navigable, with a good port at its mouth. The river Jacuhy (from the bird Jacús) is formed, on the western side of the cattle-plains, by a union of various streams, which irrigate those campos, and from whence it issues being already considerable. A few leagues after having traversed the General Serra it flows eastward, describing innumerable windings for a space of thirty leagues and on a sudden turns towards the south. After a further course of fifteen miles, having become a large river, it enters the western side of the lake Patos, about four leagues below its northern extremity. Amongst other smaller streams which swell its waters, after issuing from the serra, is the Vaccahy, which rises a few leagues to the north of the Ibicuí-Guaçu, and brings with it the Vaccahy-Mirim, which has its origin a short distance from that of the Jacuhy-Mirim. These rivers were so named after cattle began to graze near them. The gentle course of the Jacuhy is uninterrupted by cataracts, and is perfectly free to navigation. The Irapuan receives a great many currents, almost all muddy and brackish, and very cold. A species of soft black stone, with white particles like silver, are found upon many parts of its banks. On being burnt, it emits a sulphureous smell, assumes the appearance of charcoal, and is said to be of no higher value. The Butucarai comes from the north, and has a bridge. Near its mouth is the passage of Fandango. The Pigueri joins the Irohy, and comes from the Serro Pellado da Encruzilhada. The Tubatingahy originates between a serro and the Encruzilhada. The Pardo, having its source in a serra, runs through a country covered with wild woods; the large stones in its bed preclude navigation: it is passed by a bridge. The Capibari flows from the vicinity of the source of the Irohy. The Antos, formed by various currents, which issue from the lower part of the cordillera, after a considerable course towards the west, turns to the south, receives the Tibicoari, and, ten leagues farther, under the latter name, enters the Jacuhy, of which it is the largest tributary, affording an open navigation to yachts as far as the confluence, where it loses the first name.