THE FEVER. 



255 



to be the length of a march, which the whole 

 party had set down at the lowest estimate as five 

 miles. Twenty miles in a tropical sun, without 

 water and over rough ground, where the step is 

 shortened, will appear 40 in Europe, whilst the 

 hour's halt seems hut a few minutes.^ 



For two days after returning to Panga-ni we 

 abstained from taking exercise. On the third we 

 walked out several miles East along the shore, 

 and IN". West inland, under the hottest of suns 

 and over burning ground, to explore a cavern, or 

 rather a tunnel in the limestone rock of which 

 the natives, who came upon it when clearing out 

 a well, had circulated the most exaggerated ac- 

 counts. My companion already complained of 

 his last night's labour, an hour with the sextant 

 upon damp sands in the chilly dew. This excur- 

 sion finished the work. On entering the house 

 we found Caetano, who had accompanied us to 

 Euga, suffering from aches in the shoulders and 

 a cold sensation creeping up the legs. Such sen- 

 sations heralded the fever, a mahgnant bilious 



^ The German missionaries placed the Tanganyika Lake 

 GOO direct geographical miles from the sea : I reduced the dis- 

 tance to 300. This was an error. But we had been told upon 

 the coast that the Sea of Unyamweziis in Unyamwezi, and the 

 easternmost frontier of the latter region at Tura is distant 

 290 direct geographical miles from the seaboard of Zanzibar. 



