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forwards, lafted about the fpace of four minutes of 
time ; and there feemed to be little or no motion in 
the diredion of eaft and weld, the weather being 
perfsdly calm during the whole time. 
LETTER XIII. 
In Oxfordfliire, at Shirburn-Caflle, the Seat of the 
Earl of Macclesfield, Pref. R. S. as appears by 
the following JJccount, com??iunicated by his Son the 
Lord Vifcount Parker, F, R. S. then upon the Spot, 
Read Nov. 2o,y^^]sj Saturday November i, a little 
after ten o’clock in the forenoon, 
walking in the garden at Shirburn-Caftlej in Oxford- 
fhire, I perceived the gardener, who was coming to- 
wards me by the end of the moat, on a hidden hop 
fliort, and look earnefily into the water. As I found 
by his intentnefs, that he faw fomething extraordi- 
nary, I went towards him, and perceived immedi- 
ately a very ftrange motion in the water. There was 
a pretty tliick fog, not a breath of air, and the fur- 
face of the water all over the moat was as fmooth 
as a looking-glafs ; notwithfianding which, in that 
corner of the moat near which I hood, the water 
flowed into the fliore, and retired again fuccefli'vely, 
in a furprifing manner. How long it had done fo 
before I came, or in what manner it began to move, 
I cannot tell. The flux and reflux, when I faw it, 
were quite regular. Every flood began gently j its 
velocity increaled by degrees, till at Taft, with great 
impetliofity, it riiftied in till it had reached its full 
height^ at which it remained for a little while, and 
then 
