NATURAL HISTORY 
LETTER XXIIL 
TO THE SAME. 
DEAR SIR, Selborne, February 2S, 1769. 
It is not improbable that the Guernfey lizard and our green 
lizards may be fpecifically the fame; all that I know is, that, 
when fome years ago many Guernfey lizards were turned loofe in 
Pembroke college garden, in the univerfity of Oxford, they lived a 
great while, and feemed to enjoy themfelves very well, but never 
bred. Whether this circumftance will prove any thing either way 
I fliall not pretend to fay. 
I return you thanks for your account of Crejfi-hall ; but recoiled:, 
not without regret, that in June 1 746 I was vifiting for a week to- 
gether at Spalding, without ever being told that fuch a curiofity was 
juft at hand. Pray fend me word in your next what fort of tree it is 
that contains fuch a quantity of herons' nefts ; and whether the 
heronry confifts of a whole grove or wood, or only of a few trees. 
It gave me fatisfaclion to find we accorded fo well about the 
caprimulgHS : all I contended for was to prove that it -often chatters 
fitting as well as flying ; and therefore the noife was voluntary, 
and from organic impulfe, and not from the refiftance of the air 
againft the hollow of it's mouth and throat. 
If ever I faw any thing like adual migration, it was lafi: 
Michaelmas-day. I was travelling, and out early in the morning : at 
firit there was a vaft fog ; but, by the time that I was got feven or 
eight miles from home towards the coaft, the fun broke out into a 
delicate 
