[ 4>8 ] 
up a ftone fplit through the middle, whofe edges 
feemed to me to have fulphur lodged on them ; but 
I was then in a hurry, and never could find the 
place where I had taken it up. 
ExtraB 0 / L E T T E R VIII. 
Tilman Henkel, Efq\ Merchant in London, con- 
cerning the Earthquake at Oporto in Portugal, 
Nov. I, Cofnmuni c at ed by Mr. ]o\mE\Y\coty 
. F.R.S. 
Read Nov. HIS goes by Captain Richard 
»755- B Knowler, and ferves chiefly to 
acquaint you, that lafl: Saturday, the ifl infiant, we 
had fuch a terrible earthquake here, that all of us 
were afraid of being fwallowed up alive, tho’, thank 
God, it did but very little damage ; and now, I hope, 
it is quite over. *It began about half an hour pafl; 
nine o’clock in the morning, juft like thunder,- or 
rather the rattling of a coach over ftones ; and my 
own houfe, as well as moft other people’s, during 
the firft fhock, which was a very terrible one in- 
deed, was juft as if it was in a convulfion, which 
lafted, without exaggeration, at Icaft feven or eight 
minutes, and every thing ftiook and rattled in it all 
the while, exactly as if it was coming down, which 
frighted people fo much, that a great many ran, with 
all their family, into the ftreets, where I plainly faw 
the earth heave, with people walking upon it, juft 
as if it was in labour, and as it really was, the like 
never known in this country before. At fix o’clock 
