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THE NATURAL HISTORY 
Swallows and Martins collecting on a walnut-tree^ 
the next morning, which was foggy, at the dawn 
of day, they all arofe together 5 the rufhing noife 
of the wings, of fuch a fwarm of birds, againll 
the hazy air, was heard to a confiderable dif- 
tance j after that day, only a few ftragglers were 
feen. 
He has remarked in fome late fprings, that 
though they made their appearance about the mid¬ 
dle of April, yet meeting with cold, bluftering, 
north-eaft winds, they immediately withdrew, ab- 
fconding for feveral days, until warmer weather 
allured them out; hence, he infers, that they da 
not migrate. 
When a boy, he remembers to have feen a 
/haggler on Shrove Tuefday, which muft have 
been not later than the middle of March, and often 
happens early in February. He has known a 
Chimney Swallow build in the {haft of a well; but 
he adds, that they generally with us build in 
chimnies, preferring a funnel contiguous to thofe 
where there are conftant fires, and difregarding 
fmoke. 
He remarks, that the Swallow difeovers won¬ 
derful addrefs in afeending and defeending through 
fo narrow a paflage. When hovering over the top 
of the funnel, the vibrations of her wings in the 
confined air, make a rumbling noife like thunder. 
Thg 
