Edgar Ketchum Bourne, the Mission Style and the Bureau of Science Building.
The Burnham Plan of Manila was drawn 1905, might as well it took years to implement the first phase of the plan fully but the Americans already started building Manila according to their needs and imperial ambitions as early as they had the Treaty of Paris.
One of the first Architects that the Americans sent to the Philippines is Edgar Bourne. Taking note that the Spanish inspired Architecture is already rooted deeply into the Philippines, Edgar Bourne designed the first American Colonial Buildings in the Philippines with a style readily imported from Americas: Mission Style. The Mission style is a style from American States that was once part of Spanish America.
Carrying with them the technology of the concrete, the first buildings of the American Era looked like a continuation of the Spanish Inspired buildings, while fulfilling the Manifest Destiny of the US. A perfect example of buildings of this type is the Bureau of Science building in Manila. Bureau of Science is the precursor of what is now the Department of Science and Technology. It was housed in what is now part of UP Manila Campus.The building did not survive the war.
One striking feature of the building is the twin mirador towers at the center of the facade. Aside from that, the building features Spanish Roof Tiles, Arched entries and plain walls, all elements of the mission style that was so prevalent in California.
Mission style is also present in the PNU buildings in Taft Avenue. As the mission style is derived from the Spanish territories of California and Florida, it was readily applicable to the Tropical Philippine Setting dute to the wideness of courtyards and the effectivity of arched windows to ventilation.
Edgar Bourne will go on to design more pre-Burnham Buildings in Manila such as the first Manila City Hall after they went out of Ayuntamiento, the Manila Ice Plant and some piers of the port of Manila. As soon as the Burnham Plan was accepted by the Philippine Commission, he got replaced by William Parsons, who gave the transition of Architecture to the Spanish-Neoclassic hybrid to the Neoclassical works exemplified by Arellano, Mapua and Toledo.