EAKLY MAN IN BKITAIN. 



CHAPTER I. 



THE RELATION OF GEOLOGY TO ARCHAEOLOGY AND 

 HISTORY. 



The Continuity between these three Sciences. The three Phases of Life 

 on the Earth. These three Phases universal Breaks in the Succes- 

 sion accompanied "by Geographical Change. The History of Tertiary 

 Life ends with Man. The Classification of the Tertiary Period. 

 The Specialisation of the Mammalia explained by the Theory of 

 Evolution. 



OF the many fields of inquiry opened out by the intense 

 mental activity of this century, there is none which 

 promises to be more fruitful than that which has been 

 won by the joint labours of the geologist, the student of 

 prehistoric archaeology, and the historian. The geologist, 

 beginning his story of the earth at the time when the 

 rains first descended and the seas first began to beat on 

 the coast-lines, has laid, as it were, in a map before us 

 the revolutions in climate and geography that it has 

 undergone. He tells of continents submerged, and of 

 ocean bottoms lifted up to become mountains ; and he 

 points out to us that side by side with the ever-changing 

 conditions of life there were corresponding changes in 

 the living forms. Group after group of animals and 



B 



