82 Charles Darwin, 



miserable land, would redouble his cannibal feast, 

 decrease in numbers, and perhaps cease to exist." 



Tierra del Fuego was found to be the land of the 

 glacier, and numerous opportunities were afforded to 

 study them, many valleys being filled with these 

 moving rivers of ice which formed in the low ranges 

 of mountains. Some of them gave their icebergs to 

 the sea with blasts and roars like the broadside of a 

 ship of war. In Eyre's Sound Darwin saw fifty ice- 

 bergs of large size floating about at once, borne from 

 the adjacent glaciers. One of the largest observed, 

 and the farthest from the Pole, was in the Gulf of 

 Penas, where the ice river was fifteen miles in length 

 and seven broad. Darwin's studies on these glaciers, 

 and the laws which govern them, were of no little 

 value to scientists, and many of the theories regarding 

 their action which have found place as facts originated 

 with him. 



