5922942 Operations in Waziristan, 1902 (b/w photo) by Unknown photographer, (20th century); National Army Museum, London; (add.info.: Operations in Waziristan, 1902. Photograph, India, North West Frontier, 1902. Soldiers of an Indian Army unit, possibly the 52nd Sikhs (Frontier Force), man a hill top position. The sepoy on the right carries a Mance heliograph, a small mirror mounted on a tripod, that worked by reflecting sunlight in order to flash messages in Morse code. From an album of 207 photographs compiled by B R Moberly, 52nd Sikhs (Frontier Force), 1901-1925.); by National Army Museum .