PROFESSOR SIR ARTHUR KEITH, M.D., LL.D., F.R.S.

Conservator of the Museum and Hunterian Professor, Royal College of

Surgeons of England. One of the foremost living anthropologists and a

leading authority on the antiquity of man.]

[Illustration: _After T. H. Huxley (by permission of Messrs.

Macmillan)._

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