 As Calder's bakery became very successful, he opened the "City Steam Biscuit Factory" in Twin Street, Adelaide in 1872.Balfours became a household name and in 1867, when Prince Alfred, the Duke of Edinburgh, visited South Australia, James Calder was made the official biscuit baker for the Royal visit.Around this time, Calder took on his nephew John Balfour and began trading as 'Calder & Balfour'.