24 
MUNGO PARK'S 
Longitude by three sets of sights taken next morn- 
ing in order to find the apparent time at the place 
13° 9' 45" W. 
It is difficult to account for such a difference in the rate 
of going of the watch in the course of one month ; but 
the excessive heat and the motion of riding may perhaps 
have contributed to it ; for I think my observation of the 
immersion was correct. 
May 17th.— Left Manjalli Tabba Cotta, and after a 
fatiguing march of twelves miles, reached Bray, a water- 
ing place. Endeavoured to take the meridional altitude 
of the sun, by the back observation with Troughton's 
pocket sextant ; and after carefully examining his rise 
and fall, with the intervals betwixt each observation, I 
was convinced that it can be done with great accuracy, 
requiring only a steady hand and proper attention. This 
was a great relief to me ; I had been plagued watching 
the passage of the fixed stars, and often fell asleep when 
they were in the meridian. 
We left Bray at three o'clock, P. M. and carried with 
us as much water as we possibly could, intending to rest 
at Nillindingcorro till the moon rose ; but there being no 
water, our guide continued our march to the river Nerico, 
which we reached at eight o'clock, all the people and 
asses very much fatigued. Face of the country during 
