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In my garden at Bulbridge, near Godalmln in 
Surrey, on Saturday the lirfl of ^November 1755, at 
half an hour after ten in the forenoon, Philip Smith, 
my gardener, and John Street, and John Johnfon, 
two under-gardeners, were alarmed by a very un- 
ufual noife in the w ater, at the ead: end of the long 
canal, near which John Street and John Johnfon 
were then at work. On their looking that w^ay, they 
obferved the water, in that part of the canal, in 
great agitation, attended with a conliderable noife. 
The water foon railed itfelf in a heap or ridge, ex- 
tending lengthwife about thirty yards, and between 
tv\o and three feet above the ulual level of the w^ater ; 
after which the heap or ridge heeled or vibrated to- 
wards the north, or left hde of the canal, with great 
force, and flowed about eight feet over the grafs 
walk on that fide of the canal, quite up to the arch. 
On the water s returning back into the canal, it again 
raifed itfelf into a heap or ridge in the middle; after 
which the heap or ridge heeled or vibrated with greater 
force towards the fouth, or right-hand fide of the 
canal, and flowed over the grafs walk, and thorough 
the ruftic arch on that fide; and drove a fmall fiream 
of watei , which runs thorough it, feet back up- 
wards, towards its fource. During this latter mo- 
tion, the bottom of the canal, on the north fide, for 
feveral feet in width, was quite bare of water. The 
water being returned into the canal, the vibrations 
grew lefs and lefs, but fo ftrong, as to make the water 
flow feveral times over the fouth bank of the canal, 
which is not fo high as the north bank. In about a 
quarter of an hour from the firfl: appearance the wa- 
ter became quiet andfmooth as before. The motion of 
the 
