Ku-pei K`ow to the north-east, and after continuing that course as far as Fung-ning turns in a north-westerly direction to Dolonnor; a third striking due east by way of Tung-chow and Yung-Ong Fu to Shan-hai Kwan, the point where the Great Wall terminates on the coast; and a fourth which trends in a south-westerly direction to Pao-ting Fu and on to Tai-yuen Fu in Shan-si.
The surface of the country is naturally divided into five clearly distinct zones: (I) the series of volcanic peaks which extend parallel to the Pacific at a little distance inland; (2) the plains and lakes of the great depression which lies to the east of these mountains and stretches from sea to sea, between the Bay of Fonseca and the mouths of the San Juan; (3) the main cordillera, which skirts the depression on the east, and trends north-west from Monkey Point or Punta Mico on the Caribbean Sea, until it is merged in the ramifications of the Hondurian and Salvadorian highlands; (4) the plateaus which slope gradually away from the main cordillera towards the Caribbean; (5) the east or Mosquito coast,with its low-lying hinterland.
Within this area the drainage generally trends south Southern .
The general result of their investigations has been to prove that the o f India, Murtagh range, as it trends south-eastwards and finally forms a continuous mountain barrier together with the Karakoram, is the true water-divide west of the Tibetan plateau.
The eastern rampart of this great plateau is formed by the Cordillera Oriental, which extends north-west into Peru under the name of Carabaya, and south to the frontier in broken ranges, one of which trends southeast in the vicinity of Sucre.