22
found in the very posi-
tions where they were
left by primaeval man in
Palaeolithic times. At
8ft. below the ' floor' and
about 12ft. from the sur-
face of the ground, is a
bed of gravel and sand
8ft. in thickness, contain-
ing implements of older
date: this bed is shown
at the base of both the
upper and lower sections.
" To more clearly
show the nature of the
' floor ' the 60 feet of the
upper figure (where mark-
ed) is engraved below
to a larger scale : b is the
12 foot gravel containing
rolled fossil bones and
abraded Palaeolithic im-
plements ; c is fine buff-
coloured sand, often full
of fossil shells of land
and fresh-water molluscs;
odd is the ' floor ' with
its numerous unabraded
tools and flakes ; in the
part illustrated the ' floor'
is in duplicate. After the
men had made their tools
on the ' floor ' where the
lower d's occur, a slight
flood of water covered up
the tools with a thin
coating of sand ; the men
then walked over the
newly deposited material,
and made other tools on
the new ' floor.' The
two white streaks on the
top of the upper ' floor '
are London clay mixed
with sand. Sometimes the tools and flakes are to be seen in this clay,
but of course they were washed into it in Palaeolithic times by floods.
Above the ' floor ' is sand)- loam and loamy sand ; the uppermost part,