The Anna past-producing mine comprises the Anna, Milda H. and Hamilton claims and fractions, located on the west side of Little Tim Creek, north of Springer Creek and adjoining the Ottawa mine (MINFILE 082FNW155) to the east. It is accessible by 8 kilometres of good road east of Slocan.

The area is underlain by granodioritic intrusive rocks of the Middle Jurassic Nelson Batholith.

Locally, at the Anna occurrence, two shear zones in coarse-grained Nelson granite parallel each other, striking 010 degrees and dipping 35 to 44 degrees east. The property has been worked from three main adits and one prospect adit. The ore in the shear zones occurs as siliceous stringers and lenses. The east zone is approximately 15 metres wide and has been explored for approximately 30 metres vertically but so far it has yielded no ore. The west zone is approximately 5 metres wide, bounded by fault gouge on well-defined walls, and traversed by a series of cross fractures and parallel fissures in which the ore occurs. The zone is also cut at a small angle by two parallel basic dikes.

The principal ore minerals are native silver, stephanite, tetrahedrite, pyrite, minor galena and sphalerite, and locally considerable chalcopyrite. Quartz is the abundant gangue mineral and occurs with some barite.

In the original workings, the lowest adit was driven northerly along the east shear zone for approximately 73 metres, at which point a crosscut, 15 metres long, runs to the west shear, where this zone has been drifted on northerly. Approximately 55 metres along this drift, a winze was sunk and intercepted a 7-centimetre pay-streak carrying tetrahedrite and native silver. Subsequently, numerous oreshoots have been encountered along the west shear zone and much stoping has been done above the level south of the winze. The oreshoots tend to cut across the shear zone from wall to wall in a northeast direction and en echelon style; they average 15 metres in length and are up to 0.6 metre in width.

In 1927, eight samples from the West or footwall vein yielded an average of 1.7 grams per tonne gold and 3670 grams per tonne silver over an average width of 0.84 metre (Property File - M.K. Lorimar [1969-04-08]: Report on the Anna Mine).

In 1967, a sample (no.639) of the West vein from a stope on the no.3 level assayed 6902 grams per tonne silver over 0.3 metre, whereas sampling of the East vein yielded up to 17.1 grams per tonne silver over 0.9 metre (Property File - M.K. Lorimar [1967-12-11]: Report on the Anna, Myrtle, Mulvey Creek and Flathead Properties)

The initial shipment of ore from this mine, in 1912, was approximately 4 tonnes. Production was intermittent until 1928, then occurred again between 1960 and 1964, when the total ore shipped amounted to 177 tonnes averaging 5153 grams per tonne silver plus ancillary amounts of copper, lead and zinc. In 1962, 45 tonnes of material was used as a silica flux.

The claims were apparently owned and prospected by Mr. K. Zimmerman from approximately 1904 until 1925 with the exception of 1919 and 1920, when the mine was worked under lease by Mr. E. Hyde. During 1926 and 1927, the property was worked under lease by Mr. N. Bertrandias of Portland, Oregon.

The mine was idle from 1927 until 1960, when Silver King Mines Limited optioned five claims and began to drive the No. 4 level. Part-time work was carried on into 1964. Development work to this date had been carried on in five adits, three of which were short prospect tunnels driven during the early years of operations. No. 3 adit has approximately 164.5 metres of drift and 15.2 metres of crosscut tunnel. Work on No. 4 level consists of 213.3 metres of drift, 60.9 metres of raises and 39.6 metres of crosscut tunnelling. In 1962, 286.5 metres of diamond drilling was done in nine holes. In November 1965, the company name was changed to Kirsch Silver Mines Ltd. During 1967 through 1969, Silver Benn Mines Ltd. held the claims.