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prevails to the westward of the Scilly Islands . 
the land they choose to make, to lead them to the entrance of 
the Bristol Channel. That in estimating this course, they 
allowed four or five degrees in the bearing, to compensate for 
the indraught into St. George’s Channel. This angle would 
give about thirteen or fourteen nautic miles : and is probably 
what they found by experience, to be the general amount of 
the northern set * 
He goes on to say, that, in like manner, the safety of 
ships, after they come into soundings, till they reach Scilly, 
depended on their making no less allowance , than the Bristol 
men do, in the other Channel. For, says he, “ experience 
“ informs me, that from the commencement of soundings, in 
“ lat. 49 0 30 'N. to the length of Scilly, in fair weather , I had 
“ found the northern indraught to be six or eight miles in 
“ the twenty-four hours.” 
Here then, the fact of the northern set , is a second time 
recognised ; though without any suspicion, any more than 
before, of there being a westerly set, also. 
Here it may be proper to state, what appears to me to be 
a very important fact ; although perhaps, not connected with 
the current in question ; but materially affecting the safety 
of the navigation, between the British Channel and Dublin. 
It was communicated to the Author, by Captain Evans, a 
gentleman who superintends the harbour works at Holy- 
head ; and who has had much experience in the navigation 
of the Irish sea. 
* Although they might not have known at that day, the true latitude of Cape 
Clear, yet it may reasonably be supposed that they knew the quantity of the difference 
of latitude, between Cape Clear, and the high land of Padstow ; as it was so neces- 
sary to their purpose, and so easy to be obtained. 
MDCCCXV. C C 
