Section 4-7-1 - Original county boundaries.
4-7-1. [Original county boundaries.]
The boundaries of the county of Dona Ana are as follows: the southern boundary, on the left bank of the Rio del Norte, is the boundary of the state of Texas, and on the right, the dividing line between the Republic of Mexico; on the north, the boundary of the county of Socorro, and on the east and west the boundaries of the territory.