B is that of the _Reuss._ C is that of the _Rhone;_ and all
these three are _north_ of the great watershed or main chain, and all
three are full of German-speaking people.
On the other hand, D is the valley of the _Toccia,_ E of the _Maggia,_
and F of the _Ticino._ All these three are _south_ of the great
watershed, and are inhabited by Italian-speaking people. All these
three lead down at last to Lake Major, and so to Milan and so to Rome.
The straight line to Rome is marked on my map by a dotted line ending
in an arrow, and you will see that it was just my luck that it should
cross slap over that knot or tangle of ranges where all the rivers
spring. The problem was how to negotiate a passage from the valley of
the Aar to one of the three Italian valleys, without departing too far
from my straight line. To explain my track I must give the names of
all the high passes between the valleys. That between A and C is
called the _Grimsel;_ that between B and C the _Furka._ That between D
and C is the _Gries_ Pass, that between F and C the _Nufenen,_ and
that between E and F is not the easy thing it looks on the map; indeed
it is hardly a pass at all but a scramble over very high peaks, and it
is called the Crystalline Mountain.
