THE SOURCE OF THE NILE 45 
end, Black fpots are frequently found on the breaft and 
belly of the dead perfon. The belly {wells, andthe ftench 
becomes infufferable in three hours.after death, if the per- 
fon dies in the day, or if the weather 1s warm. 
Tue next common difeafe in the low country of Arabia, 
the intermediate ifland of Mafuah, and all Abyffinia, (for the 
difeafes are exactly fimilar in all this tract) is the Tertian 
fever, which is in nothing different from our Tertian, and 
As fuccefsfully treated here in the fame manner as in Europe. 
As no fpecies of this difeafe (at leaft that 1 have feen) me- 
naces the patient with death, efpecially in the beginning of 
the diforder, fome time may be allowed for preparation to 
thofe who doubt the effe& of the bark in the country. 
But ftill I apprehend the fafeft way is to give {mall dofes 
from the beginning, on the firft intermiffion, or even 
remiffion, though this fhould be fomewhat obf{cure and 
uncertain. To fpeak plainly; when the ftomach nau- 
feates, the head akes, yawning becomes frequent, and 
not an exceflive pain in the nape of the neck, when a {fhiver- 
ing which goes quickly off, a coldnefs down the fpine, a 
more than ordinary cowardlinefs and inattivity prevails, 
{the heat of the climate gives one always enough of thefe 
daft fenfations) ; I fay, when any number of thefe fymptoms 
unite, have recourfe to the powder of bark infufed in water; 
fhut your mouth againft every fort of focd; and, at the . 
crifis, your difeafe will Peed atay, decide its name among 
the clafs of fevers. 
Aux fevers end in.intermittents 3 and if thefe intermittents 
continue long, and the firft evacuations by the bark have 
mot been copious and conftant, thefe fevers generally end 
E 2 in 
