Page "Pongo de Manseriche" Paragraph 3

According to Captain Carbajal, who descended the Pongo in the little steamer Napo, in 1868, it is a vast rent in the Andes about 2000 ft ( 600 m ) deep, narrowing in places to a width of only 100 ft ( 30 m ), the precipices " seeming to close in at the top.

" Through this dark canyon the Marañón leaps along, at times, at the rate of 12 miles an hour ( 20 km / h ).