Art &  Science of  Cinematography .... 'The Director of Photography is the custodian of the heart of film making... as the writers are of its soul .... his tool is a box with a glass window, lifeless until he breathes into it his creative spirit and injects into its steel veins, the plasma of his imagination .... the product of his camera, and therefore of his magic, means many things to many persons - fulfilment of an ambition .... realization of dreams' .... Cecil B. De Mille