C io6 3 



mates, recourfe fliould be had to fome other rea- 



ion for their vanlfhîng. 



Of the three opinions, the firfl has the ut- 

 moCt appearance of probability ; which is, that 

 they remove nearer the fun, where they can find 

 a continuance of their natural diet, and a tem- 

 perature of air fuiting their conflituticns. That 

 this is the cafe with fome fpecies of European 

 Swallows, has been proved beyond contradi6tion. 

 W e often obferve them colleéled in flocks innu* 

 merable, on churches, on rocks, and on trees, 

 previous to their departure hence j and Mr. Col- 

 iinfon proves their return liere in perhaps equal 

 numbers, by two curious relations of undoubted 

 credit : the one communicated to him by Mr. 

 Wright, mafter of a fhip -, the other by the late 

 Sir Charles Wager, who both defcribed (to the 

 fame purpofe) vvhat happened to each in their 

 Yoyages. " Returning home, fays Sir Charles, 



in the fpring of the year, as I cam.e into found- 

 " ing in our channel, a great flock of Swallows 



came and fettled on all my rigging ; every 

 *^ rope was covered ^ they hung on one another 



' like 



