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29 
[fifty?] feet above the
valley- 75000 years ago,
it was the valley bottom.
This is the least length of
time I can make for
the removal of 50 feet
from this valley.
It is, probably, much longer
even: for the rock, here in
the valley bottom, like the
rock in the lower parts of
all valleys, is covered deep
beneath alluvial gravel and
drift; so that, for many
milleniums, erosion has 
ceased. Not a particle of 
deepening has taken place in this
valley, since the Glacial
Epoch-50000 years ago. All the
valley deepening took place before.
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Transcription Notes:
(number 29 is indistinct but last page was 28)