556 SWALLOWS. Class II. 



ocean, and were returning from the shores of 

 Senegal, or other parts of Africa ; so that this 

 account from that most able and honest sea- 

 man, confirms the later information of M. 

 Adanson. 



The following observations made during re- 

 peated passages of the Atlantic were commu- 

 nicated by Charles Mills, Esq. of Maccles- 

 field. 



Crossed the Atlantic, April 1770. Saw no Swallows. 



Ditto - - May 1772. Ditto. 



Ditto - - July 1773. Ditto. 



Ditto - - 16 May 1775. Lat. 20° 20' N. Long. 



29 23' W. from St. 

 Helena. Saw a swal- 

 low. 



Ditto - - 30 June 1778. Lat. 28° 5' N. Long. 20° 



Q' W. from Ascension. 

 Saw four swallows. 



Ditto - - 1 July 1778. Lat. 25° 37' N. Long. 



20° 23' W. Saw a 

 swallow. 



Ditto - 2 July 1778. Lat. 29 41' N. Long. 



20° 19' W. A swal- 

 low about the ship. 



Mr. White, on Michaelmas day, 1768, had 

 the good fortune to have ocular proof of what 

 may reasonably be supposed an actual migra- 

 tion of swallows. Travelling that morning very 



