114 JOURNEYS IN PERSIA LETTER XX That gorge is a very interesting break in an unin- teresting and monotonous region, and the broad fall above the bridge is not without elements of grandeur. The altitude of the river over which the Pul-i-Hawa hangs is only 3800 feet, the lowest attained on this journey. The popular nomenclature is adopted here, but it A TWIG! BRIDGE. would be more accurate to call this stream the Ab-i- Burujird, and to defer conferring the name of Ab-i-Diz upon it till the two great branches have united far below this point. These are the Ab-i-Burujird, rising to the west of Burujird, which with the tributaries which enter it before it reaches the Tang-i-Bahrain, drains the great plain of Silakhor, and the Ab-i-Basnoi, a part of which has been referred to under its local name of Kakulistan, or " the Curl," which drains the upper part of the Persian