rity alongside the high
bank that lines the whole front of the town. This is an advantage not
to be underrated when it is remembered that there are no wharves on
the Upper Amazon.

TAMSHIYACU.

Situated on a high bank on the south side of the river, distant 2146
miles from the Atlantic; thermometer, 76 deg.. At this place the river
is narrow, has only one channel, and the current is strong. It is
probably the only position on the Amazon, below the mouth of the
Ucayali, where vessels could be prevented from passing, up or down, by
heavy guns mounted in forts or batteries.

MOUTH OF THE UCAYALI RIVER.

Latitude, 4 deg. 28' 30" south; longitude, 73 deg. 21' 30" west of
Greenwich; magnetic variation, 7 deg. 2' east; thermometer, 80 deg.;
elevation above sea-level, 318 feet; distance from the Atlantic, 2189
miles; current in the Amazon, 3 miles per hour; depth of water in the
channel of the Amazon, 30 feet; width of the Amazon, 1300 yards.
Unfortunately, immediately at the month of the Ucayali neither the
banks of that river nor those of the Amazon afford a place suitable
for the location of a town. Nauta, on the north bank of the Amazon,
seven miles above the mouth of the Ucayali, is the nearest place at
which it is practicable to build houses not liable to be swept away by
the annual floods.

NAUTA.

Latitude, 4 deg. 31' 30" south; longitude, 73 deg. 27' west of
Greenwich; magnetic variation, 7 deg. 2' east; thermometer, 78 deg.;
elevation above sea-level, 320 feet; distance from the Atlantic, 2195
miles; current 3-1/4 miles per hour; depth of water, 30 feet; width of
river, 1200 yards. Situated on the north bank of the Amazon, near the
confluence of that river and the Ucayali, Nauta is well located for
grasping the trade of both rivers, and ought to become a place of
importance. Of course, the six or seven miles that vessels have to
ascend the Amazon to reach the place after leaving the Ucayali
constitutes a drawback, especially in the case of vessels not
propelled by steam; but no desirable place can be found below and near
the mouth of the Ucayali where buildings could be erected and vessels
could load and unload with facility at the season of high water. Below
and adjoining Nauta the banks are high and present a better site for a
town than the one on which it stands.

SAN REGIS.

Distant from the Atlantic 2230 miles; current, 3-1/3 miles per hour;
average current between Nauta and San Regis, 3-1/4 m