xxxiv 
APPENDIX. 
Wassiboo, and Diggani (a place about 15' short of Sego); and these alone, 
out of all that were taken during the route. These give a course of E 
2j°^ S, 174 geographical miles; so that when i7°of variation are allowed, 
the true course will be E iof S; the diff. lat. 31,7; departure 171,1; 
whence Diggani should be in lat. 14 0 17', and 266,1 east of Jarra. 
Between Diggani and Sego (returning again to the table of latitude and 
longitude), Mr. Park's account gives E 43 S 15'; or corrected E 26 S, 
which gives diff". lat. 6,6; departure 13,5: so that Sego, the capital town 
of Bambara, falls, by this account, in lat. 14 0 10' 30" and 279,6 east of 
Jarra.* 
In this position, it bears E io|- S from Jarra, distant 284 geographical 
miles. It is important to mention, that whilst at Jarra, the bearing of Sego 
was pointed out to Mr. Park by compass, ESE, or E 22°^ S. His route 
made it E 27°^- S, or 5 0 more to the south. This difference, so trifling in a 
distance of about 330 of our miles, on a straight line (in other words, the 
distance from London to Edinburgh), is not worth investigating. If we could 
suppose the report of the natives to be true, it would place Sego nearly 25 
minutes more to the north. For my own part, I do not believe that any 
person, from mere judgment, unassisted by geographical records, and so far 
removed as to be out of the hearing of cannon, and of the view of confla- 
grations (two circumstances that aid the most in fixing the line of direction 
between distant places), could ever come nearer than several degrees of the 
bearing of two places that are 330 British miles asunder. t 
Having at length reached the banks of the long sought for river Niger 
(or Jo lib a), near which the city of Tombuctoo stands, Mr. Park pro- 
ceeded along it several days' journey, towards the city in question, on a 
course E \§\ N by compass, but corrected E 32^ N 70 G. miles; which 
giving a diff. lat. of 37-i, departure 59, places Silla, the extreme point of 
his expedition, in latitude 14 0 48' ; and longitude by reckoning o° 59' west 
* This being equal to 4 0 47' difference of longitude, Sego, by Mr. Park's reckoning, 
would lie in 2° 1' west of Greenwich. 
f The informant might possibly be influenced by the bearing of that portion of the 
road nearest to him, which is more easterly than the part towards Sego. 
