44 NATURAL HISTORY 
Polpenrith, alias Polpere, and Polwevorel Creeks, running up to- 
wards Conftantine Church ; and a mile farther down, Chielow, 
alias Calmanfake Creek (Leland III. 13).* This haven, within a 
mile of it’s mouth, is fecure enough for fhips of 200 ton; and at 
it’s pafiage into the fea, is about a mile wide. 
to, or Low This River rifes in the higheft Northern part of Wendron parifh, 
Kerrier. 111 w h ence > in about five miles, it reaches the borough of Helfton ; a 
about a mile below which it forms a Lake, called the Lo Pool ; the 
River giving rife to the Lake, and the Lake, as the mofl remarkable 
part of the Water, giving name to the River b . 
Heyi River, Four brooks give rife to this River c ; and uniting at Relubbas 
in Penwith. f rorn a Weftern Courfe, turn to the North, and in three miles 
reach St. Erth, alias St. Ercy Bridge, of three ftone Arches, and a 
raifed Cauley well walled on each fide, reaching crols the valley. 
The Bridge has been built fomewhat more than 400 years* 1 , before 
which time there was a ferry here, and fhips of great burden came up 
to it. The valley, above bridge, has been much raifed by the 
fands and earth, wafhed down from the hills and mines ; and the 
haven below has luffered the fame misfortune, from the fands of 
the Northern fea ; fo that lighters only come within a bow-fhot of 
the bridge ; and that with the tide of flood, which at fpring tides 
flows near a mile above the bridge. Here the land of Cornwall, 
is at it’s narrowed: dimenfion ; fo that from the full fea mark of 
Heyl on the North Sea, to the full Sea-mark at Marazion in Mount’s 
Bay on the South Sea, the diftance is but three miles. From St. 
Erth the Heyl bears direftly North, fpreading an area of fand, of 
half a mile wide at a medium, and two miles long, but navigable 
only in the chanel of the River, which admits frnall fhips a mile 
inwards from the fea under the village of Lannant. Near it’s 
mouth the Heyl is joined by a brook from the Eaft, which, under 
the Parochial Church of Philac, makes a branch of this haven for 
fhips of 100 tons. The Sea has not only almofl: filled this frnall 
harbour with land, but forms a bar alio at it’s mouth, over which 
fhips of 80 and 100 ton only can come in at the height of a fpring 
tide ; and the bed of the whole is lo railed, that it admits the tide in 
it only fix hours in twelve ; fo that whereas, in harbours open to 
the lea, the tide flows fix hours, and ebbs fix hours : here ’tis 
* Kilmanach, the Monks Cell ; Chielow, or 
Killow that is, the cell or houle on the water 
or lake. 
1 Bv Leland called Hailfton, vol. iii. page 12. 
by mi (lake for Hellas, or Hel-laf-ton ; that is, the 
town on the Green River ; waters often taking 
this part of their name from their eolour ; as 
Cam-las, the Green Cam ; in Merionythlhire, 
Caernarvonfhire, and Brecknockfhire, Dukas ; in 
Brecknocklhire, Morlas aqua cawulea ; Lhuyd 
in Baxter, 274. Yr avon las the Green River in 
Glamorganfhire, ibid page 266. 
b In Speed, and Camden’s maps, and Norden, 
page 22, this river is called Cober, a miftake 
(as I apprehend) for Lober ; (that is, the bar of 
the Lo) a fandy pebbly bank, thrown up by the 
fea at the mouth of this river, and ferving as 3 
dam to form the Lake. 
c Leland, Vol. iii. page 10.. 
d Leland, ibid. 
otherwife ; 
