South of the port is the shallow entrance to the Lagoa do Norte, or Lagoa Mundahu, a salt-water lake extending inland for some miles.
In 1817 Pernambuco was the scene of a revolutionary outbreak, which resulted in the separation of the present states of Alagoas and Rio Grande do Norte, Ceara and Parahyba having been detached in 1799.
Thus the Rio San Antonio suddenly disappears near San Antonio de los Banos; the cascades of the Jatibonico del Norte disappear and reappear in a surprising manner; the Moa cascade (near Guantanamo) drops 300 ft.
There are four navigable rivers in the state - the Rio Grande del Norte, or Rio Bravo, which forms the boundary line with the United States, the Conchas or Presas, the Soto da Marina, and the Tamesi.
It is exported chiefly from San Juan del Norte, or Grey Town, and the larger proportion goes to the United States.
