Nev. Rev. Stat. § 243.170
All that portion of the Territory of Nevada within the limits hereinafter described is hereby included within the limits of Lander County: Commencing at the intersection of the 39th degree, with a line drawn due north and south from the Mount Airy Station; thence north to the 40th degree of latitude of northern boundary of Churchill County; thence east along the 40th degree of latitude west from Washington, to the 40th degree of meridian of longitude; thence north on the 40th degree of longitude to the northern boundary of Nevada Territory; thence east along the boundary line to the 115th degree of longitude west from Greenwich, or the eastern boundary of Nevada Territory; thence south along the eastern boundary to the 39th degree of north latitude; thence west along the 39th degree of north latitude to the place of beginning.
NRS 243.170