xxvi MEMOIR. 
‘‘ Now being the end of my Amazons excursion, as I embark to-morrow 
for Para, I have made a calculation of the expenses and collections. I find I 
have taken 7553 specimens of insects, which at 4d. each will bring £125 175. 8d., 
and my expenses have been (including provisions for voyage to Para, which ° 
is a trifle) 600 milreis, or £467 10s. Stevens’s commission is 20 per cent., 
and commission for remitting money, with freight of boxes, etc., is about 
5 per cent., thus leaving the produce of my collection, £94 9s. I then gain 
only £26 Igs. in one year eight months’”’ (Journal, March oth, 1851). 
Bates reached the mouth of the Rio Negro on March 27th, 
and landed at Barra to visit old friends and hear the latest news. 
On the morning of April 18th the vessel anchored in front of the 
city of Para. 
“Found Para about as usual, all old friends alive after the yellow fever. 
One letter for me from Mr. Stevens, with better news than ever: the Barra 
collection which I had calculated at £40 had already fetched £70. The first 
Ega collection, which I had calculated at £20—£34 18s., and the George 
Glen (?) collection, which I had calculated at £60—£72. The second Ega 
collection had been delivered all right and shipped for England. One new 
Callithea which I had taken at Ega had been figured and named by Hewitson 
as C. Batesig// 1" 
This encouraging report, and an improved state of health due 
to better food, made Bates once more hesitate as to returning 
home. Just then a painful task fell to him. Wallace’s brother, 
who had arrived at Pard about three weeks before Bates, was 
seized with symptoms of the fever then raging in the city while 
the two were amusing themselves there. Bates took him to the 
house of a native friend, nursed him, slept by his side four nights, 
and then succumbed himself to what, happily, proved a milder 
form of the epidemic. Young Wallace grew worse, and after 
suffering the distressing agonies of the “black vomit,” died in 
a few days. Bates recovered sufficiently to be able to attend the 
funeral of this “unfortunate, good-hearted young fellow,” as he 
calls him in his journal. 
Happily for biological science, Bates finally decided to retrace 
his steps and explore in detail the whole valley of the Amazons. 
After spending some time in preparations for a long absence, he 
left Para in October 1851, and arrived at Santarem in November. 
He made that town his head-quarters for three years and a half, 
varying his stay by excursions into the interior. The most 
important of these, to which an entire chapter of his Travels is 
given, was up the Tapajos, where he reached a settlement of the 
Mundurucus, a leading Indian tribe, warlike, but industrious, and 
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