 In 1931 , the Agent General 's office closed , and Greenfield returned to Alberta , settling in Calgary . There he entered the oil and gas business , serving as a director ( and later vice president ) of <unk> Oils , president of the Oil and Gas Association , president of the Alberta Petroleum Association , and director of Home Oil . He also served as managing director of the British Dominion Land Settlement Corporation and as president of the Calgary Board of Trade . He spent the rest of his life in the city , maintaining an office in the General Trusts Building . 
