The Cambridge History of India, Vol. I: Ancient India v1.c30.s1.23

v1.c30.s1.23

Some of the principal stages in the routes which the conquering armies must have followed, together with the distances between the stages, are known from ancient authorities who derived their information from the campaigns of Alexander and Seleucus. The most complete record has been preserved by Pliny (VI, 17 (21)). Many of his measurements are no doubt correct, when due allowance is made for the necessary detours in marches; but, as others are evidently less exact, it will be more convenient to summarise here such information as is supplied by the *Imperial Gazetteer*, and to estimate other distances approximately by straight lines drawn on the map (Railway and Canal Map of India, 1910).