Works of Art in Peat.
Probable Antiquity of the Peat, and Changes of Level
since its Growth began.
Flint Implements of antique Type in older Alluvium.
Their various Forms and great Numbers.


CHAPTER 8.

PLEISTOCENE ALLUVIUM WITH FLINT IMPLEMENTS OF THE VALLEY
OF THE SOMME--concluded.

Fluvio-marine Strata, with Flint Implements, near Abbeville.
Marine Shells in same.
Cyrena fluminalis.
Mammalia.
Entire Skeleton of Rhinoceros.
Flint Implements, why found low down in Fluviatile Deposits.
Rivers shifting their Channels.
Relative Ages of higher and lower-level Gravels.
Section of Alluvium of St. Acheul.
Two Species of Elephant and Hippopotamus coexisting with Man
in France.
Volume of Drift, proving Antiquity of Flint Implements.
Absence of Human Bones in tool-bearing Alluvium, how explained.
Value of certain Kinds of negative Evidence tested thereby.
Human Bones not found in drained Lake of Haarlem.


CHAPTER 9.