The address I delivered on August 26 at the Fourth International
Congress of Zoology at Cambridge, 'On our Present Knowledge of the
Descent of Man,' has, I find, from the high significance of the theme
and the general importance of the questions connected with it, excited
much interest, and has led to requests for its publication. Hence this
volume, edited by my friend Dr. H. Gadow, my pupil in earlier days,
who has not only revised the text, but has also enriched it by many
valuable additions and notes.