Robertson worked in several media, including metals, stone, and wood. She was commissioned by the Canadian government to sculpt coats of arms and other works. She designed the Canadian Coat of Arms in the St. Catharine's Federal Building, the coat of arms in the Customs Building in Niagara Falls, and Stations for the Cross for St. Kevin's Roman Catholic Church, Welland. Other commissions include works for the Colonnade in Toronto, the Cobourg Municipal Building, the Niagara Falls City Hall, St. Denis School in St. Catharines, and the Workman's Compensation Rehabilitation Centre. The city put the Bullas sculptures in storage as it searched for a permanent site for them until placing the cast stone works in the
Centre In The Square. In November 2002, the Niagara Parks Commission and Robertson's family unveiled three sculptures outside of the Niagara Parks Greenhouse. The three bronze sculptures are collectively known as 'Golden Fountain'. == References ==