The historic King William camp is located on Mineral Hill within a north trending belt of Upper Triassic intermediate volcanics, volcaniclastics and sediments belonging to the Nicola Group. These greenstones consist of massive, chlorite-epidote altered andesite and basalt, augite porphyry, andesitic flow breccia and tuff, minor interbedded argillite, conglomerate and limestone. Attitudes of tuff horizons and sedimentary bedding suggest that a north plunging axis of a syncline passes through Mineral Hill. Both west and north- east of Stump Lake, the Nicola Group volcanics are intruded by Lower Jurassic granitic batholiths; scattered granodiorite outcrops have been mapped in the vicinity of the camp. Secondary to the north- northeast trending Quilchena and Stump Lake regional faults are numerous smaller faults which form a complex fracture pattern and appear to control alteration and mineralization. Andesitic rocks are bleached, pervasively silicified, pyritic and brecciated. Mineral- ization occurs in numerous quartz, and less commonly calcite veins which strike generally to the north and dip steeply eastward.

The Silver King showing consists of a collapsed shaft, trenches and pits which expose a quartz vein system hosted by massive altered andesite. The shaft intersects narrow quartz stringers (5 centimetres wide) carrying galena, sphalerite and pyrite. Arsenopyrite was encountered in more recent trenches. The orientation of the vein zone strikes from 360 to 020 degrees and the dips vary from 70 degrees east to 65 degrees west. Grab samples assay up to 4.45 grams per tonne gold, 248.87 grams per tonne silver, 14 per cent lead, 0.23 per cent zinc and 0.01 per cent copper (Assessment Report 5152).