[ 199 ] 
wards of 1700 Years ago. It may therefore ferve 
to prove, that the Sea ftnce that Time has not ex- 
ceeded thefe Bounds, and that the Foffils dug up 
above this Level are more antient than it, tho’ we 
have no proper ‘Data to difcovcr how long before, 
the Sea had palled this Height. 
I have been pretty exaft in examining the Situa- 
tion of this Camp, imagining the two Sides had 
pointed due Eaft and Wed, and the two Ends North 
and South : But I find they differ from it full ten 
Degrees, after allowing for the Variation of the 
Needle : Whence it is plain the Meridian of the 
Place mud have altered better than half a Degree 
each Century to the Weft ward, provided the Situa- 
tion of the Camp was placed due North and South 
when it was firft formed. But polllbly the Romans 
might not be exadl as to the Points of the Compafs, 
or perhaps this Variation was at firft difpenfed with 
to accommodate the Camp to the natural Declivity 
of the Ground. Thefe Difficulties however may bet- 
ter be cleared up, if fome ingenious Gentlemen would 
take the Trouble to examine fome other Roman 
Camps in different Parts of this Kingdom, to difeo- 
ver whether the Romans paid a ftrift Regard to the 
difpofing of their Camps with their Sides to the four 
cardinal Points of the Compafs, which I think it will 
nearly amount to a Demonftration that they did, if 
they are found to agree with this Camp at Caftor 
in its Variation from due North and South. 
The Figure of the Camp is not a Square (as it is 
deferibed by moft Authors who have writ upon it) 
but a Parallelogram, whofe two longeft Sides are 
each 440 Yards, and its Ends or two fhorter Sides 
360 
