THE ENCADINE. 
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stream to its origin we find the valley becoming 
gradually narrow'er and less deep, until at last we 
arrive either at a mere rill on the side of a hill, or 
at a spring rising from a combe in the hillside, and 
finally at a ridge which forms the watershed. The 
Upper Engadine forms a remarkable exception. If 
we look upwards from Celerina towards the Maloja 
Fig. 150.— Section across the valley of Pontresina. 
we see above us a broad valley, which would appear 
to indicate a great river, the source of which must 
be miles away. Instead of this we have a succession 
of lakes, threaded on a small stream, and when we 
arrive at the Maloja, the main valley, still broad and 
deep, suddenly ends, and we find ourselves on the 
brink of a steep descent into the Val Bregaglia. The 
Engadine is in fact a truncated valley, the so-called 
