Before our own no European army, except that of Alexander, has ever traversed Affghanistan, and some interest naturally attaches to his movements among the passes so well known to us. Hitherto, however, the attempts to trace his progress have not been very satisfactory. My attention was drawn to the question, and reading a paper by Henry L. Long in an old number of the Classical Museum, I was led to believe with him that the theory of Grote and most historians which sends Alexander through Kohistan and the neighbourhood was untenable.