{ m 3 
XII. An Account of feveral Earthquakes felt in Wales. By 
Thomas Pennant, Efq. F. R. S. in a Letter to Sir Jofeph 
Banks, P. R. S. 
Read January 2 5 , 1781. 
6EAK SIR, , Downing, 
Dec. 1 2, 1781* 
I T is very fingular, that ill three days after my return home 
I (hould be reminded of mypromife by a repetition of the 
very phenomenon on which I had engaged to write to you : 
for on Saturday laft, between four and five in the evening, we 
were alarmed with two (hocks of an earthquake ; a flight one, 
immediately followed by another very violent. It feemed to 
come from the north-eaft, and was preceded by the ufual noife ; 
at prefent I cannot trace it farther than Holywell. 
The earthquake preceding this was on the 29th of Au- 
guft laft> 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 ftrong enough to terrify us b 
They came from the north-weft ; were felt in Anglefea, at Caer- 
narvon, Llanrwft, in the ifle of Clwyd fouth of Denbigh, at 
this houfe, and in Holywell ; but I could not 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. LXXI. C c before 
