vi IXTKODTJCTION. 



implicitly following the original outline of the drawing as 

 far as possible, has honestly endeavoured to give such a 

 rendering of the entire work, as the Doctor would have done 

 had he lived to return home, and superintend the construc- 

 tion; and I take this opportunity of expressing my sincere 

 gratification that Mr. Bolton's rare technical skill, scientific 

 knowledge, and unwearying labour have been available for 

 the purpose. 



Amongst almost the last words that Livingstone wrote, I 

 find an unfinished letter to myself, in which he gives me 

 very clear and explicit directions concerning the geographical 

 notes he had previously sent home, and I am but carrying- 

 out the sacred duty which is attached to a last wish when 

 I call attention to the fact, that he particularly desired in 

 this letter that no positions gathered from his observations for 

 latitude and longitude, nor for the levels of the Lahes, <£r., 

 should be considered correct till Sir Thomas Maclear had 

 examined them. The position of Casembe's town, and of a 

 point near Pambette at the S.E., and of Lake Liemba 

 (Tanganyika), have been computed and corrected by Sir 

 T. Maclear and Dr. Mann. The observations for latitude 

 were taken at short intervals, and where it has been possible 

 to test them they have been found very correct, but I 

 repeat that until the imprimatur of his old friend at the- 

 Cape of Good Hope stands over the whole of Livingstone's 

 work, the map must be accepted as open to further correc- 

 tions. 



The journey from Kabwabwata to Mparru has been inserted 

 entirely from notes, as the traveller was too ill to mark the 

 route: this is the only instance in all his wanderings where 

 he failed to give some indication on his map of the nature 

 of the ground over which he passed. The journey from 

 Mikindany Bay to Lake Nyassa has also been laid down 

 from his journal and latitudes in consequence of the section 

 of this part of his route (which he left at Ujiji) not having 



