ADVERTISEMENT. 
the present work ; at whose request the following state- 
ment respecting certain difficulties which have occurred in 
its construction, is subjoined. 
In compiling the map of Mr. Park's route in 1805, much 
difficulty has arisen from the bearings of places not being 
mentioned in the Journal ; and also in consequence of 
there being occasionally great ditFerences between the 
latitudes and longitudes of places according to the astro- 
nomical observations, and the distances computed accord- 
ing to the journies. Considerable pains have been taken 
to reconcile these differences ; but the general result has 
been, that it was found necessary in adhering to the astro- 
nomical observations, to carry Mr. Park's former route in 
1796 farther north, and to place it in a higher latitude than 
that in which it appears in Major Rennell's map annexed 
to the former volume of Travels." 
London f March 1, 1815 . 
