In the caves at Cresswell Craggs in
Derbyshire notable Palaeolithic discoveries were made, but for some reason
these savage hordes seem to have come no further north than that spot. We
know, however, that many animals belonging to the pre-glacial period
struggled for their existence in the neighbourhood of Pickering.
[Illustration: A plan and section of Kirkdale Cave.]
It was during the summer of 1821 that the famous cave at Kirkdale was
discovered, and the bones of twenty-two different species of animals were
brought to light. Careful examination showed that the cave had for a long
time been the haunt of hyaenas of the Pleistocene Period, a geological
division of time, which embraces in its latter part the age of Palaeolithic
man. The spotted hyaena that is now to be found only in Africa, south of
the Sahara,[1] was then inhabiting the forests of Yorkshire and preying on
animals now either extinct or only living in tropical climates. The waters
of Lake Pickering seem to have risen to a sufficiently high level at one
period to drive out the occupants of the cave and to have remained static
for long enough to allow the accumulation of about a foot of alluvium
above the bones that littered the floor. By this means it appears that the
large quantity of broken fragments of bones that were recent at the time
of the inundation were preserved to our own times without any perceptible
signs of decomposition.
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