5921391 ?Sharp turn in the defile [below Ali Masjid], a very rough bit?, 1879 (b/w photo) by Burke, John (fl.1878-79); National Army Museum, London; (add.info.: ?Sharp turn in the defile [below Ali Masjid], a very rough bit?, 1879. Photograph by John Burke, 2nd Afghan War (1878-1880), 1879. A view of the rough terrain in the river gorge at the foot of Ali Masjid fortress. The latter sat upon steep cliffs and was located at the centre of the Khyber Pass, protecting its narrowest point. When the British invaded Afghanistan the Peshawar Valley Field Force, led by Lieutenant-General Sam Browne, captured the fort on 21 November 1878 in order to secure British control of the Khyber. From an album of 100 photographs by John Burke, 1878 circa.); by National Army Museum .