The creators of the earliest of these flint tools were
people such as Neanderthals, who were stockier in build than
'modern' humans, and had heavy, prominent faces. 'Modern' humans,
people much more like us, became dominant about 35,000 years ago.
We know that these people, of the palaeolithic period ('Old Stone
Age',c.500,000 to c.8500 BC), were few in number, and that they
were very skilled hunter-gatherers, able to live off the land
without any formal method of agriculture.
The Peterborough area was on the fringe of the glaciers
during the last Ice Age, and when it ended, around 10,000 years
ago, people moved once more into the thawing landscape. This was
probably a very mobile population, following game migrations and
seasonal foodstuffs across the country. The river valleys served as
hunting grounds and as corridors to ease travel through the heavily
wooded landscape. Rising sea levels, and the sluggish
progress of the rivers flowing to the North Sea, caused reed swamp
to develop in the Fens. Trees toppled, and were submerged for
thousands of years, re-appearing as 'bog oaks' when the Fens were
eventually drained.