Bird's eye view from the tower of the Chronicle Building, San Francisco, USA, 1895. In the mid 19th century the city expanded rapidly due to the California Gold Rush, which brought a flood of treasure seekers (known as 'forty-niners', as in '1849'). From "Round the World in Pictures and Photographs: From London Bridge to Charing Cross via Yokohama and Chicago". [George Newnes Ltd, London, 1895]