Note 756 — SECTION II. KĀBUL666

15 miles below Atak (Erskine). Mr. Erskine notes that he found no warrant, previous to Abū’l-faẓl’s, for calling the Indus the Nīl-āb, and that to find one would solve an ancient geographical difficulty. This difficulty, my husband suggests, was Alexander’s supposition that the Indus was the Nile. In books grouping round the Bābur-nāma, the name Nīl-āb is not applied to the Indus, but to the ferry-station on that river, said to owe its name to a spring of azure water on its eastern side. (Cf. Afẓal Khān Khattak, R.’s Notes p. 447.)

I find the name Nīl-āb applied to the Kābul-river:—1. to its Arghandī affluent (Cunningham, p. 17, Map); 2. through its boatman class, the Nīl-ābīs of Lālpūra, Jalālābād and Kūnār (G. of I. 1907, art. Kābul); 3. inferentially to it as a tributary of the Indus (D’Herbélot); 4. to it near its confluence with the grey, silt-laden Indus, as blue by contrast (Sayyid Ghulām-i-muḥammad, R.’s Notes p. 34). (For Nīl-āb (Naulibis?) in Ghūr-bund see Cunningham, p. 32 and Masson, iii, 169.)