17
Laguna to Santa Lucia 26
Santa Lucia to Santa Maria 55
Santa Maria to Yurimaguas 26
Yurimaguas to Cainarachi 38
Cainarachi to Rumicallarina 8
Rumicallarina to Chasuta 50
Chasuta to Lake Chiquicoba 300
---
Length of the Huallaga river 520
Distance from the source of the Huallaga to the
mouth of the Amazon 2950

UCAYALI RIVER.

The Ucayali river has its origin in the Andean region, about Lake
Titicaca, and flows, under various names, in a direction nearly north
until it mingles its waters with those of the Amazon, to which river
it bears the same relation that the Missouri does to the Mississippi;
that is to say, like the Missouri, its length and volume of water
entitles it to be considered a continuation and not a tributary of the
main river. During the season of low water 24 feet can be carried from
Nauta, at the mouth of the river, to Sarayacu; 18 feet from Sarayacu
to the mouth of the Pachitea river; and 12 feet from the mouth of the
Pachitea to the confluence of the Tambo and Urubamba. The average
current from the mouth of the river to Pucacura is 2 miles per hour,
and from Pucacura to the confluence of the Tambo and Urubamba 3 miles
per hour. The Tambo is probably navigable for steamers drawing eight
or ten feet of water to the confluence of the Ene and Perene, and
thence the Perene would afford communication, at least by canoes, to
San Ramon, a Peruvian military post; from San Ramon to Tarma, and from
Tarma to Lima, would, of course, be the continuation of the route to
the Pacific slope. The first step towards the opening of this most
desirable of all the routes between the Pacific coast and the Amazon
would be the establishment of a battalion post at the confluence of
the Ene and Perene, communicating at regular and stated intervals with
San Ramon. The distance between the two posts would be about 60 miles
of canoe navigation, and would soon become a traveled route forming
the connecting link between eastern and western Peru.

MOUTH OF THE UCAYALI.

Latitude, 4 deg. 28' 30" south; longitude, 73 deg. 21' 30" west of
Greenwich; magnetic var