CHINCHA ISLANDS. 171 
the smallness of the excavations, which at some distance are 
hardly perceptible, to convince himself of the inexhaustible 
supply. Some huts have been constructed on the islaud, where, 
in the midst of ammoniacal effluvia, some Peruvian custom- 
house officers and soldiers superintend the working of the 
guano-mines.” 
Birds of Passage 
