Note IV'-43 — Chapter IV · OBSERVATIONS ON NEW SPAIN.[IV'-1]

The Rio Grande does not now cross Coahuila, but forms its whole U. S. border on the N. W., N., and N. E. But there are a good many rivers in Coahuila, some of them notable. 1. Prominent among these is the whole course of the Sabinas, and of its main fork on which is Monclova, together with their respective tributaries, down to where the two are joined, to continue under the name of Rio Salado to the Rio Grande; the Salado cuts across the tip end of New Leon, but again becomes Coahuilan to the extent of separating Coahuila from Nuevo Leon before entering Tamaulipas. The "Aqua Verde" lake which Pike names, and which is rather centrally than westerly located, is the Laguna de Agua Verde; which, with a neighboring one called Santa Maria, belongs to the water-system of the Sabinas. 2. The two rivers which flow into Lag. del Muerto and Lag. de Parras enter Coahuila. 3. The headwaters of the Rio San Juan, on one of which Saltillo, the capital, is situated, are in Coahuila. 4. A series of Coahuilan streams falls into the Rio Grande at successive points from below Presidio Salto to above Presidio San Vincento.