INTRODUCTION. xlv 
4 
nights so pleasant, that we feel no inconvenience from our 
bivouac in the open air.” The fever appeared moreover 
in some degree contagious, as all the attendants on the 
sick were attacked, so that before they got out of the 
river it had pervaded nearly the whole crew, and extended 
to that of the transport; Mr. Me Kerrow was himself 
last of all attacked after leaving the coast, but he con- 
sidered mental anxiety and disturbed rest as the sole 
causes. From the general symptoms that shewed them- 
selves in most of the cases, the fever would seem to be 
closely allied to the yellow fever of the West Indies, 
as indicated by ‘ the violent affection of the head, the 
suffused eye, oppressien at the preecordia, great prostra- 
tion and anxious timidity at the commencement, the yel- 
low suffusion and grumous vomiting, with the indifference 
and apparent resignation, at the latter stage of the dis- 
ease.” The most prominent features of the disease are 
thus described by Mr. Me Kerrow. 
«¢ The fever, as I observed it in those who were attacked 
on board, was generally ushered in by cold rigors, succeed- 
ed by severe headache, chiefly confined to the temples and 
across the forehead, in some cases, pain of the back and 
lower extremities, great oppression at the precordia, and 
bilious vomiting, which in many cases proved extremely 
distressing ; but in general, where the headache was very 
severe, the gastric symptoms wert milder, and vice versa, 
though in some, both existed in a violent degree. Great 
anxiety and prostration of strength, the eyes in general 
watery, though in some the tunica conjunctiva was of a 
pearly lustre ; the tongue at first white and smooth, having 
a tremulous motion when put out, and shortly becoming 
