of Devonshire and Cornwall. 1 27 



feet above the level of the sea, six miles east of Varallo^ at the 

 entrance of the vallies of Sesia Grande and Piccola. 



From Grampound to Falmouth, by Creed, Tregony, Tregear, and 

 St. Mawes, grauwacke slate continues the whole way, and the fertility 

 of the country sufficiently indicates it, as that kind of rock is very 

 abundant in springs. The granite ridge begins sensibly to lower, 

 and consequently the grauwacke formation occupies less extent. It 

 is found on the sea-shore, traversed by quartz ^'■eins, although it is 

 stratified. I observed this, among other things, in crossing from St. 

 Mawes to Falmouth, near a strong fort on the right, facing Penden- 

 nis Castle. 



There is something very romantic in the view of the port of Fal- 

 mouth from the heights of St. Just : it resembles very much the 

 situation of Loch Long and Loch Fine In Argyleshire. There is at 

 first some difficulty in believing that all those creeks which penetrate 

 so far into the interior of the country, are basins of salt water. 



I observed on this road, that near Pennare Point, a small promon- 

 tory a few miles E. N. E. of Falmouth, the cliffs were high and pre- 

 cipitous. 



The grauwacke slate still prevails from Falmouth to Menaccan : 

 there is a fine quarry of it from Falmouth to Penryn, which skirts 

 tlie bottom of the hill on one side, and the King's Road on the 

 other. The beautiful river called the Hel flows over the same rock, 

 at the ferry, near its mouth, from Mawnan to Helford. It is inter- 

 sected there by a great number of quartz veins, and blocks of it 

 of different sizes are found on the road from Penryn to Mawnan 

 Smith. This very extensive formation at length terminates near a 

 small sea-port called Port-hallo, or as the inhabitants pronounce it, 

 Pralo, which is three miles S. S. E. of Menaccan, across the Dinnis. 

 This river runs in the bottom of a valley, where the substance named 



