[ 59 3 
From the fouthermoft hill of Brehar I obferved the 
Guel hill, and the ifle of Guel (mark’d/) ftretching 
away towards the little ifle of Sylley, and with it 
making a curve, of which Sylley is the head-land : 
from the furthermofl: hill of Brehar, a promontory 
fhoots out in the fame fweep, and at the extremity, 
a vaft rocky Tor call’d the Brehar, behind which a 
ledge of many pointed rocks (hew themfelves above 
water, intimating the former connexion, and with 
what great devaftations the furious ocean has diflolv’d 
it. So that Sylley, which is now a bare rock, and 
Separated from the lands of Guel and Brehar by a 
narrow frith of fea, was formerly join’d to them by 
low necks of lands, being the rocky promontory of 
one large ifland now broke into feven. 
To purfue this conje&ure (if I may call that fo, 
which has lb many reafons tofupport it) a little farther: 
When all thefe feven illands, Sampfon, Brehar, Tref- 
caw, St. Elen’s, Theon, St. Martin’s, and St. Mary’s, 
made but one, that one went by the name of Sylley, 
or fome name of like found and derivation * j and, 
having fome little illands fcatter’d round it, imparted 
its name to them 5 whence, what were called by the 
Greeks Caffiterides, were nam’d by the Latin authors 
Sygdeles, Sillinae, or Silures, from the Britilh name, 
as I apprehend, which they found them call’d by 
H 2 among 
* Sul-leh lignifies in Cornu-britilh, flat rocks, of, or dedicated 
to, the fun. So the mount of St. Michael was call’d in Cornu- 
britilh Din-ful, the hill confecrated to the fun ; and, as I conje&ure, 
the vaft flat rocks, common in thefe illands, had the like dedica- 
tion : For, upon the furface of one of them, there are the remains 
of an antient Druid temple. It is one plane of rock, edg’d with 
nine vaft ftones {'the reft taken awayj planted in a circular line, 
meafuring 172 feet froi» north to fouth, and 138 feet from eaft to 
weft. 
