During the time of the Commonwealth, Manila still served as the nation's capital. During these times too that Commonwealth President Manuel L. Quezon dreamed of a city that could become the future capital of the country, replacing Manila. In the summer of 1939 President Quezon contacted William Parsons and asked him to choose a new site for and then to design a new Philippine capital. Parsons arrived in June 1939 and eventually chose Diliman as the new capital site. He also managed to produce a master plan for the new University of the Philippines. Unfortunately he died in December of that year. Harry Frost, Parsons’ former partner took over and joined Juan Arellano and A. D. Williams in the Planning Commission. A fourth member of the team, landscape architect Louis P. Croft joined them as advisor on planning and park design. They were commissioned to produce a master plan for Quezon City; this was approved in 1941.