POSTSCRIPT TO PREFACE. vii 



was accomplished by Speke and Grant, but rather to confirm 

 their illustrious discoveries. 



I have to acknowledge the obliging readiness of Lord 

 Russell in lending me the drawiEgs taken by the artist who 

 was in the first instance attached to the Expedition. These 

 sketches, with photographs by Charles Livingstone and Dr. 

 Kirk, have materially assisted in the illustrations. I would 

 also very sincerely thank my friends Professor Owen and 

 Mr. Oswell for many valuable hints and other aid in the 

 preparation of this volume. 



Newstead Abbey, 

 April 16, 1865. 



POSTSCRIPT TO PEEFACE. 



The credit which I was fain to award to the Lisbon 

 statesmen for a sincere desire to put an end to the slave- 

 trade* is, I regret to find, totally undeserved. They have 

 employed one Mons. Lacerda, to try to extinguish the facts 

 adduced by me before the meeting of the " British Associa- 

 tion for the Advancement of Science," at Bath, by a series 

 of papers in the Portuguese Official Journal ; and their 

 Minister for Foreign Affairs has since devoted some of 

 the funds of his Government to the translation and circula- 

 tion of Mons. Lacerda's articles in the form of an English 

 tract. Nothing is more conspicuous in this official document 

 than the extreme ignorance displayed of the geography 

 of the country of which they pretend that they possess 

 not only the knowledge, but also the dominion. A vague 

 rumour, cited by some old author, about two marshes below 

 Murchison's Cataracts, is considered conclusive evidence 



h 2 



