ice overflowed all the lowlands and buried under a new
accumulation of bowlder clay such parts of the old land surface
as it did not erode. Substantially the same set of changes are
observed in English and German geology.<28>

Having thus given an outline of the climatic changes which took
place in Europe during the Glacial Age, and the grounds on which
these strange conclusions rest, we must now turn our attention
to the appearance of man.

The uncertainties which hung over his presence in the earlier
periods, spoken of in the former chapter, do not apply to the
proofs of his presence during this age, though it is far from
settled at what particular portion of the Glacial Age he came
into Europe. We must remember we are to investigate the past,
and to awaken an interest in the history of a people who trod
this earth in ages long ago. The evidence on which we establish
a history of the early tribes of Europe is necessarily
fragmentary, but still a portion here and a piece there are
found to form one whole, and enable us to form quite a vivid
conception of manners and times now very far remote.

It is not claimed that we have surmounted every difficulty--on
the contrary, there is yet much to be deciphered; but, in some
respects, we are now better acquainted with these shadowy tribes
of early times than with those whose history has been recorded
by the historian's facile pen. He has given us a record of
blood. He acquaints us with the march of vast armies, tells us
of pillaged cities, and gives us the names of a long roll of
titled kings; but, unfortunately, we know little of the home