There are some few rivers of this region which do not enter the basin of the Halys. The chief of these is the Chekerek, which rises likewise in the Ak Dagh Mountains, and pursues a circuitous course northwards, in avoiding the slopes of minor ranges, until it joins the river Iris at Amasîa. The last-named river, called in Turkish the Yeshil Irmak, with its main branch the Lycus, belongs entirely to the coastal system, and so does not enter into our account of the interior plateau. Another stream just eastward of the Iris is the Thermodon, made famous in Greek literature[57] by its association with the Amazons. This is one of a series of similar rivers which flow almost directly northwards to the Black Sea from the lower Armenian hills. There are other short rivers of like kind westward of the Halys, some of which help to feed that river, while others flow directly to the sea. These do not need to be mentioned by their names, as they all fall away from the northern slopes of the broken and irregular chain of mountains that forms the northern boundary to the tableland. [Illustration: PLATE XV YUZGAT: DERVISH AND VAGABONDS KULAKLY KEUI: TYPES OF INHABITANTS] The most westerly main river flowing to the Black Sea is the Sangarius or Sakaria, which rises in the interior, and avoids the northern ranges by a long westerly détour. Numerous early tributaries of this great river rise indeed in the slopes of those northern mountains, while others fall from the western side of the divide, which on the east overlooks the Halys. These meander southward and westward, seeking for an opening through the upland region of which Angora is the economic centre. The country which they water resembles in general characteristics many portions in the basin of the Halys; and though large tracts equally remain barren and neglected through lack of population, it is on the whole better cultivated, and hence more productive. Angora itself is strikingly placed upon a hill, crowned by an old fortress which overlooks a ravine with precipitous sides.[58] Here are extensive gardens and cultivation in sheltered spots, and in the immediate neighbourhood are numerous orchards and vineyards. The place is famous for its fruits, especially pears and apples, and for its honey. The Angora goat is historic, and there is still a considerable trade in the mohair which this animal produces, and to some extent in special woven fabrics. It is the administrative headquarters of a large province, the seat, that is to say, of a Wali; and is an important trade centre for the interior. Several main roads converge upon it, notably the high road connecting Constantinople with the East, by way of Yuzgat and Sivas, which crosses the Halys at Cheshme Keupru. A route no longer of first importance, but dating probably from Phrygian times[59] at least, connects Angora with Giaour-Kalesi, some thirty miles south-west, and another place in this vicinity with which we