As a young Author I may be allowed to make a few introductory remarks, for the purpose of propitiating that spirit of critical inquiry which will probably be directed to the examination of these volumes.<br><br>To undertake this journey into Africa I resigned a valuable medical appointment in the East, and voluntarily assumed the character of an adventurer. My taste and prudence were questioned much at the time by my friends. Whether the results of the ambition which prompted me to endeavour to be of service to others are, or are not, sufficient reward for the sacrifice I made, now depends upon the judgment of my reader.<br><br>In 1840 I held the appointment of Surgeon on board the iron armed steamer Phlegethon, on secret service, but presumed to be bound for the Eastern coast of Africa or India.