Mining district
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A section of country usually designated by name and described or understood as being confined within certain natural boundaries, in which the precious metals (or their ores) are found in paying quantities, and which is worked therefor, under rules and regulations prescribed or agreed Upon by the miners therein.
In S. v. Smith (C. C.) 11 Fed. 490._