PHYSICAL FEATURES OF CHILI. 



413 



name (" Duck River "), towards which the Valle Hermoso (" Fair Vale ") is 

 inclined. Few travellers venture to cross from one slope to the other by this 



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difficult pass; nevertheless in 1817, General San Martin surmounted it with his 

 whole array to outflank the Spanish forces, which were expecting him farther south 

 at the Cumbre Pass. Thanks to this movement the Republican troops were able to 



