The Gallant Boy, A.K.A. American and/or Haskins past producing mine is at an elevation of approximately 2250 metres, on the crest of Silver Cup ridge between American Creek, which flows to the southwest into Trout Lake and Haskins Creek, which flows to the northeast into Healy Creek. The principal workings are on the Gallant Boy (L.14179) claim, on the southeast side of Haskins Creek. This tenure is at the south end of a line of six that follow the ridge to the northwest. They are, from south to north, Gallant Boy (L.14179), Bonanza King (L.14178), Harlock (L.14180), Butt Fraction #1 (L.14176), Butt Fraction #2 (L.14177) and Butt (L.14082). At the time, they comprised Mining Lease M219. The more northerly parts of the lease are described as the Butte Group [082KNW095] and Bonanza [082KNW112] prospects.

The Gallant Boy vein produced small amounts of hand picked ore in the late 1890s and early 1900s, although it is not all documented. It was then acquired by Mountain Lion Mining and Development Company Limited, which drove a crosscut 16.8 metres and intersected the vein approximately 10.7 metres below surface. The company drifted along a 0.3 to 0.91 metre wide "fissure vein" for a further 56.4 metres. Although no shipments were made in 1901, the value put on the ore that year was approximately "$100/ton". In 1902, Mountain Lion drove a second crosscut 198 metres to tap the vein at a vertical depth of approximately 243.8 metres, and the following year it completed an additional 457 metres of development work. In all, five adits were driven on the property. Most of the work appears to have been done before 1914. The later history of the property is not well known. It appears to have been owned by the Lardeau Gold and Silver Mining Company, in 1927.

In the late 1960s, Mining Lease M219 was acquired by Burdos Mining Limited. The company examined the Gallant Boy property and it is described by T. R. Tough and Associates Limited, in 1972 (EMPR PF: Tough report for Burdos Mining Limited). At that time, three of the five adits had collapsed. Camborne Resources Limited acquired the property and issued a prospectus describing the area in 1988. By then, a fourth adit had collapsed. The workings tested the vein over a vertical distance of 152 metres.

The Trout Lake area is underlain by a thick succession of sedimentary and volcanic rocks of the Badshot Formation and Lardeau Group near the northern end of the Kootenay arc, an arcuate, north to northwest trending belt of Paleozoic and Mesozoic strata that is now classified as a distinct, pericratonic, terrane. The arc rocks are bordered by Precambrian quartzite in the east and they young to the west, where they are bounded by Jurassic-age intrusive complexes. They were deformed during the Antler orogeny in Devonian-Mississippian time and were refolded and faulted during the Columbian orogeny, in the Middle Jurassic. A large panel, the "Selkirk allochthon", was later offset to the northeast by dip-slip motion along the Columbia River fault.

The Badshot Formation is composed of a thick Cambrian limestone that is a distinctive marker horizon in the Trout Lake area. It is underlain by Hamill Group quartzite and it is overlain by a younger assemblage of limestone, calcareous, graphitic and siliceous argillite and siltstone, sandstone, quartzite and conglomerate, and also mafic volcanic flows, tuffs and breccias, all of which belong to the Lardeau Group. The rocks are isoclinally folded and intensely deformed, but only weakly metamorphosed. They occur as intercalated beds of marble, quartzite and grey, green and black phyllite and schist. Fyles and Eastwood (EMPR BULL 45) subdivided the group into six formations (Index, Triune, Ajax, Sharon Creek, Jowett and Broadview) of which the lowermost (Index) and uppermost (Broadview) are the most widespread. The Triune (siliceous argillite), Ajax (quartzite) and Sharon Creek (siliceous argillite) are restricted to the Trout Lake area. The Jowett is a mafic volcanic unit.

The Gallant Boy (American/Haskins) occurrence is on the northeast side of Silver Cup Ridge, and on the northeast side of the Silver Cup anticline. The tenure is underlain by a variety of green, grey and black phyllites of the Index Formation. The rocks are highly deformed and intensely schistose. They commonly display parasitic isoclinal folds with shallow, northwesterly plunging axes. The rocks are locally intruded by dykes and/or stocks of gabbro or diorite.

The Gallant Boy vein was one of the first located in the Trout Lake area and it was developed and mined in the late 1890s and early 1900s. It has a strike of 050 degrees, a dip of 60 degrees to the southeast and is markedly discordant to local stratigraphy and structure. The vein is in a graphitic shear zone. It is quartz-carbonate rich and locally sulphide-bearing. In the late 1890s, it produced "small amounts" of hand picked ore, averaging approximately 3086 grams per tonne silver and 75 per cent lead from a vein of "solid galena shipping ore" approximately 0.3 metre wide. Mountain Lion's first crosscut intersected the vein approximately 10.7 metres below surface. At this locality, it was a 0.3 to 0.91 metre wide "fissure vein" composed of galena and carbonate. The galena was reported to be more or less continuous and up to 0.3 metre in width over the last 21.3 metres of the drift. Mountain Lion's second crosscut tapped the vein at a vertical depth of approximately 243.8 metres. Camborne Resources Limited describes the vein, as exposed in the only remaining open adit (on the No. 1 level) as being brecciated and between 0.5 and 1.2 metres wide. It consisted of several stages of deposition of massive and disseminated galena, sphalerite and minor pyrite in quartz and carbonate gangue. Grab samples collected from the dump at this time are reported to have assayed up to 0.68 to 8.57 grams per tonne gold, 416.6 grams per tonne silver, 4.3 per cent lead and 8.95 per cent zinc.