The adjacent country is fertile, producing beautiful pine and other trees of excellent timber. The Jacuhy, (ten leagues below the Jacoari,) at the part where on a sudden it turns to the south, is two miles in width, forming a bay, where it receives the Cahy, which issues from the plains on the summit of the General Serra, with a course of about twenty-five leagues, almost south, and affording a navigation to yachts of ten leagues. The Sino, something smaller, which rises on the top of the same serra, more to the south, runs south-west, and is navigable for a considerable distance. The Gravatahy, which has its origin in the same hills, further to the south, runs in the same direction, and affords navigation for a space of five leagues. The rivers Igarupay, Daymar, and Gualeguay, are the principal ones which enter the Uruguay, by the left bank, between the mouths of the Ibicuí and the Negro. The Maldonado, and the two rivers Solis, (small and great,) discharge themselves into the gulf of the river Plate. Rio Grande de St. Pedro is the name of the outlet of the lake of Patos, and is about ten miles in length almost north and south, near one league in width, and is situated sixty leagues north-east from Cape St. Mary. The lateral lands are very flat, and destitute of trees or buildings to direct the navigator, who, at a distance only of two leagues, with clear weather, can but just distinguish the entrance to the port in 32° 4′, where the ebbing and flowing of the water generally produce an agitated sea, rendering the shoals variable, so that no ship can or should enter the port without a well experienced person, acquainted with the state of the bar.