The original vision of RBG was a mixture of horticultural displays and protected natural forests and wetlands. The first Director of RBG, Dr. Norman Radforth, was appointed in 1947 and was a Professor of Botany at nearby McMaster University. In 1954 Leslie Laking, initially Assistant Director and Horticulturist, was appointed as Director and served until 1981. Under his guidance, the institution developed into the major entity it is today. With approximately 1,100 ha (2,700 acres) of property, Royal Botanical Gardens is one of the largest such institutions in North America. In 2006, the Auxiliary of RBG published "Love, sweat and soil: a history of Royal Botanical Gardens from 1930 to 1981" authored by Dr. Laking.