i8 7 8J 
Glacial Drift in North America. 
73 
of the land-ice, of the rivers running in deeper channels, of 
the formation of forest and peat beds in tradts now below 
the level of the sea, of the recession of the land-ice, of the 
interruption of the drainage of the country, and the forma- 
tion of a continental ice-dammed lake over which floated 
icebergs. The same evidence, too, that palaeolithic man 
and the extindb mammals were pre-diluvial, and were 
destroyed or driven out of the country by the rising of the 
great flood. 
That American geologists will follow up the evidences of 
pre-dilvuial man in the western hemisphere we may be sure, 
and we may confidently expect that as great advances will 
be made by them in our knowledge of the relation he bore 
to the Glacial period as they are making in every other 
department of geology, and in fadt in every branch of 
science. 
It is a matter for congratulation that this question should 
be in the hands of such a skilled and enthusiastic archaeolo- 
gist as Dr. Abbott, and of such able and cautious geologists 
as Prof. Cook and Prof. Smock. I feel confident that we 
shall not have to wait long for confirmation of the position 
of the implements below the iceberg drift, and for more 
definite information than we now possess of the height 
above the sea to which the erratic blocks extend, and the 
distances they have travelled from the north or north-west. 
Nor need we despair of evidence soon being found that man 
was present in the country at the time of the greatest ex- 
tension of the land-ice ; the witness of which, so far, is the 
solitary scratched chipped pebble from the moraine at 
Butzville, the fabrication of which by man is doubted by 
some that have seen it. 
I cannot conclude this brief view of the broad features of 
the glaciation of North-eastern America and the relation of 
palaeolithic man to it, as seen from my standpoint, without 
again making an appeal for a more thorough examination 
of the records in our own country. It is susceptible of 
proof in East Anglia whether or not palaeolithic man lived 
there in the Glacial period. Within a stone’s throw at 
Ploxne lie all the glacial beds — the till, the lower boulder 
clay, the middle sands and gravels, and the upper boulder 
clay. There also are the gravels and clays in which Mr. 
Frere, nearly eighty years ago, found flint implements and 
hones of extindt mammals ; and yet to this day we have 
not settled the relation that these bear to the glacial beds. 
Eighteen months ago, in the pages of this Journal, I gave 
my reasons for believing that the post-glacial age of these 
