PREFACE. 
xiii 
down, as it were, the parts of Dr Leyden's 
performance, and arranging them anew, in 
the more comprehensive plan which is now 
adopted.* 
In the present arrangement, the two in- 
troductory chapters trace the progress of dis- 
covery, from the earhest ages to the com- 
mencement of maritime enterprise in mo- 
dern Europe. The First Book then follows 
the progress of modern discovery in the 
interior; and this subject, being of peculiar 
interest, occupies the whole of the first vo- 
lume. Under this head, it has been ne- 
* The following list will enable the reader at once to 
trace the parts of the work for which he is indebted to 
Dr Leyden. 
Book I. Chap. IV. Travels in the Sahara, I. p. 286—299. 
■ V. The African Association, p. 300 — 34^2. 
VI. Park's First Journey, p. 343 — 408. 
VII. Browne's Journey, p. 409 — 428. 
Book II. Chap. II. Description of Egypt (published for 
the first time), II. p. 107—194. 
IV. The Western Coast, p. 261—314. 
The rest of the work it has been necessary to supply 
from other sources. 
