I 
THE lUPlHS OF THE JIADElliA AXD THE MAMOBfi. 71 
qiumtitics of floating tiral)or at tlie inoutli of tlic riyor must also have 
sorved to chaugo its old Indian name of Caiary into Madeira.* 
The 15i;m, "wliose mouth is above the fall on the left hand, lias a AV'idth 
of 1,100 yards, and an average deijth of 8 fathoms. As it discharges a 
\oluuie of l-‘)3,386 eidiie feet per second, at its ordinary level (being 
something more than the united volume of the Mamorc and Guapore), tlie 
Beni oiight to be considered as the main stream of the Madeira, and the 
two others as its tributaiies ; and, consequently, the name of Madeira 
ought to be given to the river only from beloAV the mouth of the Beni, 
Avhile above it the name of Mamore, as that of the larger of the tAvo, 
ought to be bestowed ; not of Guapoi:6 or Itenez, as is generally done in 
Bolma.f 
The mouth of the Beni, AAdiich Ave found to be ou the 10“ 20' of 
Soutliern latitude, and ou the 22“ 12' 20" of longitude West from 
Eio de Janeiro, was designated in the last regulation of boimdaries 
between Bolma and Brazil as the point Avliero the frontier, running 
due West betAA'een the Madeira and JaAmry, tonehes the shore of the 
former. Consequently the loft shore of the Madeira, or Mamore, is 
BoliAnau tcrritoiy Aipwards from the mouth of the Beni, while the right 
belongs to the Brazilian province of Mato Grosso, far up to the Guapore. 
At the time of oiu- sojourn in Bolma, the patriotic party of the so-called 
llepublic, adverse to Brazil, Avas highly indignant at this treaty, at the 
evident victory of Brazilian diplomacy, or, as many said, of Brazilian gold 
over their alAsmys money-wanting and greedy Dictator, Melgarejo. But 
since this, as well as many other tilings besides, continued the same after 
his eximlsion and subsequent death, avc must suppose that the hot spirits 
have cooled doAVu again, or that the eoiistruetiou of the Madeira Ilailroad, 
the increasing trade of both countries, and the prosperity of the Bolivian 
proAdnccs East of the Andes, clearly resulting therefrom, are thought a 
sufficient equivalent. 
* Tli0 isle of Madeira, uuw totally denuded of its forests, also owes its name to its 
abtmdanoe in timber ; which must have seemed extraordinaiy to the Portuguese, whose 
coimtry was already sWpiied of woods at the time of their discovering the isle. 
f These differeuces iu the uomeuolatiu'e are, ou the whole, of little importance, as 
in these desert, out-of-the-way countries, they mostly dejiend on the caprices of the 
travellers and geograijhers ; but it does seem incomprehensible that, a few years ago, 
maps shoidd have boon edited, like the Carte Gcneralo de I’Ameriquo du Sud, par Brue, 
on which the Mamore is marked as a tributary of the Beni ; as if such crude enws had 
not been corrected long before, by the exiilorations of tlie Poiiuguese in the eighteenth 
century. ^ .« 
D 
