 In 1911, the partnership of Coghlan, Welsh and Tancred ended when Tancred died.Around the same time, Coghlan, who was representing a mining company, encountered Ernest Guest in opposition in a case in the court of the Mining Commissioner, who judged in favour of Guest's client.Coghlan, although irritated by Guest, recognised his ability and offered him a partnership, which he accepted, leading to the formation of Coghlan, Welsh and Guest in Salisbury in 1912.