by J.P. Dart, Mining Engineer ; A. L. Bancroft & Co. Lith. S.F.
Coordinates approximate and based on Greenwich meridian.
Compass rose.
"Scale - 1 mile to the in."
Shows drainage, township and section lines, mining claims, land ownership, ditches, roads and trails.
Illustrations of trees: white oak, scrub pine, black oak, red pine, fir, sugar pine.
"Sonora, August, 1879 Copyright."