224 THE ANTIQUITY OF MAN 
made under circumstances which makes their high 
antiquity a reasonable presumption, should be placed 
fully on record, with no fact kept back and none put 
forward that is not proven. 
In a former chapter, while describing the Moulin 
Quignon mandible, reference was made to a lower jaw 
found at Foxhall (see p. 200), which lies a few miles 
to the east of Ipswich. The deposit from which the 
mandible is believed to have come is formed of mid- 
glacial sands, a stratum of which is to be seen under 
the boulder clay at Bolton and Laughlin's pit (fig. 75). 
As already said, the evidence in favour of the antiquity 
of this specimen is only presumptive. 
If we are unable to trace man by his actual remains to 
a point beyond the boulder clay, in the deposits of East 
Anglia, it is otherwise as regards his implements. Sir 
Charles Lyell expected these deposits to yield traces of 
early man. In 1863, when he wrote the first edition 
of his Antiquity of Man ^ he expressed this conviction very 
clearly as follows : — 
" Neither need we despair of one day meeting 
with the signs of man's existence in the Cromer 
forest bed [see fig. 74, p. 212], or in the overlying 
deposits, on the ground of any uncongeniality of the 
climate or incongruity in the state of the animate 
creation with the well-being of our species." 
It is clear Sir Charles Lyell realised that the world was 
suitable for man's habitation at the end of the Pliocene 
period, and that he was prepared to find human remains 
in deposits as old as the Cromer beds. Before the 
nineteenth century was out his prophecy came true. In 
1897, Mr Lewis Abbott discovered flint implements 
definitely shaped by man's hand in the "elephant" 
stratum of the Cromer beds.^ In 191 1, Dr W. L. H. 
Duckworth of Cambridge found another specimen.- So 
1 W. J. Lewis Abbott, F.G.S., "Worked Plints from the Cromer Beds," 
Natural Science, 1897, vol. x. p. 89. 
2 W. L. H. Duckworth, Cambrids^e Antiquar. Soc. Coniinufiic, 191 1, 
vol. XV. p. I 56. 
