[ 277 ] 
rigging of the admiral’s (hip, though they migth in- 
deed reft themlelves ? 
Sir Charles, however, exprefly informs us, that 
he was in the channel, and within foundings; th- fe 
birds, therefore (like Bellon’s quails) were only railing 
probably from headland to headland; and being forced 
out by a ftrong wind, were obliged to fettle upon 
the firft ibip they faw, or otherwise muff have drop- 
ped into the fea, which I make no doubt hap- 
pens to many unfortunate birds under the fame ch> 
cumftances. 
As the birds which thus fettled upon Sir Charles 
Wager’s rigging were fwallows, it very naturally 
brings me now to confider the celebrated obfervation 
of Monf. Adanfon, under all its circumftances, as it 
hath been fo much relied upon, and by naturalifts of 
fo great eminence. 
Monf. Adanfon is a very ingenious writer, and the 
publick is much indebted to him for many of the re- 
marks which he made whilft he refided in Senegal. 
I may, however, I think, prefume to fay, that he 
had not before his voyage made ornithology his parti- 
cular ftudy ; proofs of which are not wanting in other 
parts of his work, which do not relate to fwallows. 
For example, he fuppofes, that the Canary birds 
which are bred in Europe are white, and that they 
become fo by our climate’s being more cold than 
that of Africa. 
“■ J’ai remarque que leferin qui devient tout blanc 
te en France, eft a Teneriffe d’un gris prefque aufii 
44 foncd que celui de la linotte ; ce changernent de 
“ couleur provient vraifemblablement de la froidure 
41 de notre climat 
# Voyage au Senega!, p. 13*. 
Mr*. 
