MEN OF THE loo-FOOT TERRACE 177 
of a totally different type from modern brachycephalic 
skulls, the vault is so low. At the utmost, on the 
allowances given for the frontal and parietal bones, the 
height of the vault above the ear-holes could not be more 
than 105 mm.^ The brain capacity of such a skull, 
using the Lee-Pearson formula, 183 x 148 x 105 x -4 x 
206= 1340 c.c. — a brain capacity about equal to that of 
the modern Englishwoman. 
Thus of all the people who lived in England during 
the long Acheulean period, fashioning the multitude of 
implements which mark the deposits of their time — many 
of them implements which show high skill and artistic 
tastes — only two documents remain to tell us what kind 
of men and women they were. One of these documents, 
the Dartford skull, is of doubtful authenticity ; the other, 
the Bury St Edmunds fragment, is such a mutilated 
document that one may well hesitate in forming any 
certain conclusion as to the type of person it represents. 
We know only their flint implements. Such habitations 
or shelters as they may have built, such implements as 
they fashioned in less durable material than stone, have 
been destroyed by the lapse of time. We have seen that 
valleys, which had been filled up, were again excavated 
during the Acheulean period, except in such cases as 
at Hoxne, where the river system had been changed. 
The fiUed-up valley at Hoxne, with brick earths on the 
top, containing the implements discovered by Frere, 
remains now as at the close of the Acheulean period. In 
the Thames valley the Acheulean deposits have apparently 
been swept away, all except a fringe or terrace here and 
there. 
In the next chapter but one a search will be made 
on the Continent for remains of Acheulean man. The 
Continent, it will be seen, repeats the story of England — 
such remains as have been found of the Acheuleans are of 
the modern type of man, not of the Neanderthal type. 
' In my paper in the Journ. of Anat. the ilhistrations show the correct 
height, 105 mm., but an error is made in the text. Tlie height is given 
as 115 mm. instead of 105 mm. 
12 
