The Duncan (Lot 2605) past producer is located 3.0 kilometres west of the summit of Mount Wallace and 2.0 kilometres east-southeast of Beaverdell, British Columbia (Assessment Report 16772).

Initial prospecting began in the Beaverdell area in the late 1880s. The first ore was shipped in 1896. The major producing mines in the Beaverdell silver-lead-zinc vein camp, from west to east, were the Wellington (082ESW072), Sally and Rob Roy (082ESW073), Beaver (082ESW040), and Bell (082ESW030), with numerous other small workings throughout the area.

Past development on the Duncan began in 1901 when galena was discovered in a small quartz vein. In 1904, the Duncan claim was Crown granted to R. Wood and associates. From 1904 to 1911 the Wallace Mountain Mining Co. did most of the development work under the direction of T. Henderson. By 1909, development work included 5 small shafts, the deepest being 30 metres, 104 metres drifting, and some stoping. Since 1949, work has been intermittent and ownership has changed several times: 1947 - Silver Bounty Mines Ltd., 1958 - Sheritt-Lee Mines Ltd., 1963 - Ruby Silver Mines Ltd., 1971 - Copper Bounty Mines Ltd. and 1983 - Walmont Precious Metals Corp. The occurrence is currently owned by IGF Metals Inc. Recent property work by IGF Metals Inc. has renewed interest in the Duncan south-Bounty Fr. veins.

For a detailed description of the geology and mineralization of the area refer to the Beaverdell (082ESW030).

The Duncan Crown grant (Lot 2605) adjoins the Bounty Fr. claim (082ESW066) in the south-southeast. The property is underlain by Westkettle Batholith granodiorite. Mineralized quartz veins occupy a faulted, east trending shear zone. The shears are 30 to 120 centimetres wide, sometimes branching into two. The veins strike 090 degrees, dipping 60 degrees north to vertical and vary from a few to 35 centimetres in width. North-striking faults with moderate to steep dips to the northwest have offset the vein repeatedly.

Mineralization consists of tetrahedrite, galena, sphalerite, pyrite and native silver in a gangue of mainly quartz and occasional calcite. Some hematite is also present and may indicate oxidation. Channel sample #18 taken of quartz vein material yielded 220 grams per tonne silver and 0.03 gram per tonne gold over 0.40 metre (Assessment Report 16772). The sample was taken in 1987 from a pit exposing a shear zone with iron staining, intense silicification and brecciation, near two abandoned adits and a shaft near the south claim boundary of the Duncan claim. Channel sample #14 was taken over 0.15 metre from the central part of an exposed shear zone with minor galena and intense limonitic and siliceous alteration. It yielded 494 grams per tonne silver and 0.03 gram per tonne gold (Assessment Report 16772).

Total recorded production from 1919 to 1930 for the Duncan is 39 tonnes from which 120,463 grams of silver and 1481 kilograms of lead were recovered.