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the Cantabrian Sea. The city Santander is its chief 
port, from whence you afeend foutherly, twelve long 
leagues, a fucceftion of high craggy mountains, to the 
town of Revnofa in the upper Montana, which extent 
ftretches three leagues more, and then you continually 
defeend about fourteen leagues to the city of Burgos, 
the capital of Old Caftile. 
Revnofa is in the center of an open plain, furrounded 
by a ridge of high mountains, at whofe feet are low 
hills of pafture-land. 
To the weft of Reynofa, in an hour’s walk, is the 
fource of the great river Ebro, which receives all the 
waters on that fide, and conveys them into the Medi- 
terranean, feven leagues below the city Tortofa. 
All the fpring, rain and fnow waters, of the 
mountains to the north of Reynofa, run into the Bay 
of Bifcay. 
The waters, from the fouth chain of the mountains, 
are collected in the river Pifverga, which runs into the 
river Duero, and from thence are carried to the 
Atlantic ocean at Oporto. 
Hence we fee, that the adjacent parts of Reynofa 
divide the waters of the three feas, which lye north, 
eaft, and weft. 
Eight leagues fquare of this upper Montana is the 
higheft land in Spain ; the mountains rife to the at- 
molphere to the line of congelation; I fee fnow from 
my window this 4th of Auguft, as writing this letter. 
Some years ago there ufed to fall fo much fnow, that 
the people were forced to dig lanes through it, to go 
to church, in the winter; but there has fallen little 
fnow fince the earthquake at Lifbon, and fome years 
none at all. I am perfuaded, it changed the climates 
6 of 
