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XIL An Account of feveral Earthquakes felt in Wales. By 
Thomas Pennant, Efq. F . R. S. in a Better to Sir Jofeph 
Banks, P. R> S, 
Read January 25, 1781. 
DEAR SIR, Downing, 
Dec. a, 178 r. 
I T is very lingular, that in three days after my return home 
I fhould be reminded of my promife by a repetition of the 
very phenomenon on which I had engaged to write to you : 
for on Saturday lad:, between four and five in the evening, we 
were alarmed with tvim (hocks of an earthquake ; a (light one, 
immediately followed by another very violent. It feemed to 
come from the north- ead, and was preceded by the ufual noife ; 
at prefent I cannot trace it farther than Holy well. 
The earthquake preceding this was on the 29th of Au~ 
gild; lad:, about a quarter before nine in the morning. I 
was fore- warned of it by a rumbling noife not unlike the 
coming of a great waggon into my court-yard. Two (hocks 
immediately followed, which were drong enough to terrify us* 
They came from the north- wed: ; were felt in Anglefea, at Caer- 
narvon, LJannvd, in the file of Clwyd fouth of Denbigh, at 
this houfe, and in Holywell ; but I could nGt difcover that 
their force extended any farther. 
The next in this retrograde way of enumerating thefe phe- 
nomena was on the 8th of September 1775, about a quarter 
Vol. JLXXI. C c before 
