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a c co rd in g ly ; whence L a b y and T e em b o are p laced much nearer to the coast, than D r . W a ds trom ’s map rep resents : fo r it appears b y the Journal, that Kis se y , at the head o f the r iv e r o f the same name, is no more than eight jo um ie s from T e em b o . N o r has the map more than 1 20 geographic miles between them, admitting the scale to be British miles, as I have concluded.* T h e nearest point in M r . Pa rk’s route falls at 112. G . miles to the northward o f the extreme point o f M r . W a t t ’s ; and the riv er G am b ia la y nearly midway between them. T h u s , the map o f M r . W a t t forms a most useful point o f comparison; and adds confirmation to the repor t o f the natives, respecting the course o f the G am b ia ; fo r M r . P a rk was told, that it was crossed in the wa y from the Faleme river, to F o o ta J a llo , o f which T e em b o is the capital. Pisania, on the G am b ia (called also K u t tija r F a c to ry ), the p lac e o f M r . P a rk ’s o u t s e t f is stated b y D ’A n v ille to b e 1 7 0 G . miles above J illifre y , b y the difference o f lo n g itu d e ; but b y M . W o o d v ille ’ s map, no more than 1 5 6 ; which answers better to the statement o f the land jo u rn e y ; fo r M r . P a rk was to ld that it was no more than 65-jo um ie s o f a * Dr. Afzelius supposes that the town of Kissey may be, in direct distance, about 36 geographical miles to the north-east by east of Serra Leona. Hence, Teembo should be no more than 156 from Serra Leona. On the general map it is 170. I have adhered to the bearing lines on Mr. Watt’s map; but think it probable that Teembo, and the whole route may be more to the south. f This is the residence o f Dr. L a i d l e y , a gentleman to whom Mr. P a r k and the A s s o c i a t i o n are under gredt obligations. He received Mr. Park into his house, and treated him more like a child o f the family than a stranger. He cured Mr. Park o f a serious illness, which confined him for many weeks: and when Mr. Park was disappointed Of the goods necessary for his expences, which were to have been sent out with Consul Willis, the Doctor supplied him with every possible necessary, he had occasion for 5 taking his bills upon the Association ‘for the amount. X A journey Of an ordinary traveller may be taken at about 17 geographical miles in direct distance; 'that of'messengers m India, is equal to about 25, or too English miles by the road, in 'three days. Pisania then, is placed in longitude 13 ° 28 ', according to this re sult; an d in latitude 1 30 3 5 ' north, acco rding to M r . Pa rk’s observ ation, b y sextant. T he-causes o f the apparent wanderings o f M r . P a rk |h a v in g been e x plained in the former part o f this wo rk , it will be no farther necessary to trace his course, than merely to explain the connection o f the different parts o f the da ta fo r the general construction. Since the scale o f the M a p is fixed b y the computed distances arising on the intervals o f time employed in M r . P a rk ’ s route, it is possible that some readers may b e startled at the idea o f following such an apparently v a gu e authority. T h o se , however, who have been much in the habit o f o b se rv ing their rate o f travelling, will be easily conv inced that distances may be approximated ; and those in particular who h a y e been much accustomed to travel in countries, where time regulates the distance ; o r who have been in habits o f w orking up geographical materials o f this kind, will be the most e a s ily convinced. I t will o f course be understood, that calculations o f this k in d can on ly b e received from persons o f ju d gm en t and e x p e r ien c e : and also, that when opportunities o f che ckin g them, o c cu r , they are always resorted t o ; after w h ich , o f course, no alternative remains, but to adopt the corrected distance. In the present case, the rate o f trave lling o f cam e ls * does not a p p ly ; as M r . P a rk ’ s jo u rn e y outwards was made on horseback, and his return chie fly on foot. N o r are camels, indeed, in use in that line o f route. ■The checks to b e employed, are the number o f jo um ie s reported b y the trav elling merchants, from different points o f M r . P a rk ’s route to S e g o and T om b u c to o ; and also those from the quarters o f M o ro c c o , T u n is , ■and F e z z a n , to T om b u c to o ; using as a scale, the rate arising on the route between F e z z a n and E g yp t, M o ro c c o and Ja rra, as the best known lines o f distance. T h e s e , altogether, furnish such kind o f authority as will, I trust, lead to a satisfactory conclus ion; as the general coincidence is certainly v e ry striking. M y mode o f p rocedure, has been, to ca lcula te, in the first instance, • See Phil. Trans, for 1791. d


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