The showing, discovered in 1906 by the Daykin brothers, is located on the west shore of Collison Bay below sea level, and may only be worked at low tide.

The property was worked on by owner John Lawson and Alex Smith in 1913. Some ore was mined and sacked for shipment to the smelters. In the same year the property was surveyed preparatory to obtaining a Crown grant.

Barrel Resources Ltd. in 1973 held 40 claims in the Itsa and CU groups, covering the southern and western shores of Collison Bay and including several old properties.

Work done over the area included linecutting and magnetometer survey, 74 kilometres; electromagnetic survey, 4.6 kilometres; geochemical soil survey, 97 samples taken at 30 by 61-metre grid spacing.

The area is underlain by Vancouver Group, Upper Triassic Karmutsen Formation consisting of basalt and interlava limestones. Diorite of the Collison Bay Stock, part of the Middle to Late Jurassic Burnaby Island Plutonic Suite, lies to the east of the occurrence.

Mineralization, consisting of chalcopyrite and minor bornite, occurs in altered limestone and parts of the bordering intrusive.

In 1913, about 14 tonnes of ore was shipped from the property. From this ore, 534 kilograms of copper with 218 grams of silver were recovered.