282 The Natural History of Selborne 



advance a considerable and never-failing resource. Persons 

 that are much abroad, and travel early and late, such as 

 shepherds, fishermen, &c., can tell what prodigious fogs 

 prevail in the night on elevated downs, even in the hottest 

 parts of summer ; and how much the surfaces of things are 

 drenched by those swimming vapours, though, to the senses, 

 all the while, little moisture seems to fall. 



I am, &c. 



