  Could anyone please add the following references ?   On Alexander's track to the Indus  personal narrative of explorations on the North-west frontier of India Stein, Aurel, Sir, 1862-1943. 1929 | London  Macmillan | xvi, 182 p  G. Tucci, ‘On Swat, the Dards and Connected Problems’, East and West 27 (1977), pp. 9–104.