The Gillespie vein, one of the Havilah mine deposits, is located about 3 kilometres south of McKinlay Peak, 18 kilometres southeast of Port Alberni.

Paleozoic Sicker Group volcanics of the Devonian Duck Lake Formation are cut by a body of coarse-grained hybrid diorite of the Early to Middle Jurassic Island Plutonic Suite. A north trending faul bounds the diorite to the west and cuts andesite to the north of the diorite.

The Gillespie vein occurs in andesite along a north-northeast trending shear zone for about 200 metres, strikes 010 degrees and dips 65 to 80 degrees east. The vein, 10 to 80 centimetres wide, averages 30 centimetres in width and contains ribbon-quartz with pyrite, sphalerite, galena, pyrrhotite, arsenopyrite and chalco- pyrite. The wall-rock is replaced by mariposite and carbonate minerals.

A 0.20 metre chip sample assayed 7.33 grams per tonne gold and 317.09 grams per tonne silver (George Cross News Letter #2, 1990). From the Gillespie vein in 1936 and 1939, 949 tonnes was mined produced 8,056 grams of gold, 43,669 grams of silver, 4,244 kilograms of copper, and 12,677 kilograms of lead. The McQuillan vein (O92F 437) lies 600 metres to the south.

From 1999 through 2002, Mandalay Resources completed programs of prospecting and rock and soil geochemical surveys on the King claims. In 2001, a selected grab sample of dump material assayed 26.65 grams per tonne gold, 44.0 parts per million silver, 4559 parts per million copper, 8600 parts per million lead and 3.1 per cent zinc (Assessment Report 26721).