New Mexico Statutes Chapter 4. Counties § 4-27-2. Boundary between Sierra and Grant counties

That the boundary line between the counties of Sierra and Grant be, and the same is hereby located, fixed and established as follows:

beginning at a point where the line between townships 12 and 13 south of the New Mexico principal base line intersects the one hundred and eighth (108th) meridian west of Greenwich, and running thence eastwardly along the said line between said townships 12 and 13 south, to the summit of the Sierra Mimbres, or Black range, and thence southwardly along the summit of said Sierra Mimbres, or Black range, to Mule springs in Mule pass in Cook's canyon range, and thence east-southeast to the southwest corner of township 19 south of range 7 west of the New Mexico principal base and meridian.