Of ice to do it.
But proof after proof as furnished, and the finally the
world had to believe.
The wise men not only said the glacier moved, but they
timed its movement. They ciphered out a glacier's gait,
and then said confidently that it would travel just
so far in so many years. There is record of a striking
and curious example of the accuracy which may be attained
in these reckonings.
In 1820 the ascent of Mont Blanc was attempted by a Russian
and two Englishmen, with seven guides. They had reached
a prodigious altitude, and were approaching the summit,
when an avalanche swept several of the party down a
sharp slope of two hundred feet and hurled five of them
(all guides) into one of the crevices of a glacier.
The life of one of the five was saved by a long barometer
which was strapped to his back - it bridged the crevice
and suspended him until help came. The alpenstock
or baton of another saved its owner in a similar way.
Three men were lost - Pierre Balmat, Pierre Carrier,
and Auguste Tairraz. They had been hurled down into the
fathomless great deeps of the crevice.
Dr. Forbes, the English geologist, had made frequent visits
to the Mont Blanc region, and had given much attention
to the disputed question of the movement of glaciers.
During one of these visits he completed his estimates
of the rate of movement of the glacier which had swallowed
up the three guides, and uttered the prediction that the
glacier would deliver up its dead at the foot of the
mountain thirty-five years from the time of the accident,
or possibly forty.
