Note 7 — Chapter XII · THE VALLEY OF THE MAGDALENA
Reading edition
The highest point the road need reach in crossing the Eastern Cordilleras will be less than that of several passes in Colorado, where the Rocky Mountains are scaled by the iron-horse with a long train of cargo behind him. The pass of Chipaque, by which we entered the altiplanicies of Bogotá, is several thousand feet lower than the heights crossed by the railways leading from the waters of the Pacific to Lake Titicaca, and to Argentina by way of Cumbre Pass, and is nearly a mile lower than the point where the Galera tunnel pierces the Cordillera on the way from Lima to Oroya.7