University of Bristol - Historical Photographs of China reference number: NA16-055. Image from an album in The National Archives referenced as ‘HONG KONG 3. Views of Hong Kong from the 1860s to the 1920s' (CO 1069-446). More information on the history of the Kowloon reservoir can be found at: https://industrialhistoryhk.org/hong-kong-water-supply-kowloon-reservoir/. See NA16-056 and NA16-060.
Collecting Valley No 2, Kowloon Reservoir, Hong Kong
Black and white photograph
The National Archives, London