C 610 3 
Surface, I immediately concluded, that fuch a Mo- 
tion rnuft be occafion’d only by an Earthquake. 
However, as moft of the Neighbours were confi-> 
dent that the Shock was occafiond by the blowing 
up of the Powder-Mills at Hounjlow , I difpatched 
a MdTenger thither on Horfeback, who brought me 
Word, that the Shock was not felt either there or 
at Brentford 5 and that he could not learn that it 
had been felt farther Weft ward than Kenfington - 
Turnpike. 
I have alfo fince been inform'd, that it was felt 
at Fulham j but a Friend, who lives a little beyond 
Richmond , has fent me Word, that they did not 
fed it there. 
Of thole who were in the Street, or upon the 
River, fome felt it, and others not. 
I am credibly informed, that Letters from Calais 
and Boulogne mention its having been felt on that 
Coaft. 
It feems therefore to have extended itfdF far to- 
the Eaft ; but to have terminated in the Weft, about 
two Miles beyond this Place.. I am. Sir, with the 
greateft Refpett, 
Tour mojl humble Servant , 
J. Marty n. 
VII. 
ExtraE? of a Letter from Mr IX rembley f 7 . R . 
to the Preiident, concerning the fame. 
SIR , Harwich , Feb. II. 1749 - 50 . 
JteaJFe b. 15 / |AdE Earthquake was not felt at In- 
*749-5°- gatftone , not at Colchejler , nor at 
this Town. 
VII. 
