BY
LEONARD V. DALTON, B.Sc. (Lond.)
FELLOW OF THE GEOLOGICAL AND ROYAL GEOGRAPHICAL
SOCIETIES, ETC.

WITH A MAP AND 34 ILLUSTRATIONS

T. FISHER UNWIN

LONDON:
ADELPHI TERRACE

LEIPSIC:
INSELSTRASSE 20

1912

(All rights reserved.)

TO
D. R. R.

INTRODUCTORY NOTE