more probable that a bird should retire to its hyber- 

 naculum just at hand, than return for a week or two 

 only to warmer latitudes. 



The swallow, though called the chimney-swallow% 

 by no means builds altogether in chimneys, but often 



House-swallows. 



within barns and out-houses, against the rafters ; and 

 so she did in Virgil's time :—'' Garrula quam tignis 

 nidos suspendat hirundo." '* The twittering swallow 

 hanpfs its nest from the beams." 



