Chap. 6.] Rivers underground. 503 



this circumftance is founded one of the moft beau- 

 tiful fables of antiquity, relative to the fountain of 

 Arethufa, in Sicily. The fame thing is affirmed of 

 the Rhine, and even of the river Mole, in Surrey, 

 which, from this circumftance, derives its name. 

 With refpecl: to the two latter rivers, however, fome 

 doubts are entertained of the fa6l, but thefe are rather 

 a fubject of inquiry to the geographer than to the na- 

 tural hiftorian. 



Kk 4 



