r Nanay.

"4th. A chart of the River Tigre-yacu, from its mouth to a
point 111 miles above its mouth, drawn upon two sheets and on
a scale of one inch for each two miles.

"5th. A chart of the River Huallaga, from its mouth to
Rumi-Callirina, the termination of steamer navigation, drawn
upon two sheets and on a scale of one inch for each two miles.
This chart comprises 169 miles of the Huallaga river.

"6th. A chart of the River Morona, from its mouth to a point
37 miles above its mouth, drawn upon one sheet and on a scale
of one inch for each two miles.

"7th. A chart of the River Patro, from its mouth to the
termination of navigation for steamers of small draught, drawn
upon one sheet and on a scale of one inch for each two miles.
This chart contains 64 miles of the Patro river.

"8th. A chart of the River Ucayali, from its mouth to the
confluence of the Rivers Urubamba and Tambo, drawn upon nine
sheets and on a scale of one inch for each two miles. The
Rivers Urubamba and Tambo, from their mouths to the highest
point to which steamer navigation is practicable, are included
in this chart, which contains 885 miles of the River Ucayali,
24 miles of the River Urubamba, and 53 miles of the River
Tambo.

"9th. A chart of the River Pachitea, from its mouth to the
confluence of the Rivers Palcazu and Pichis, drawn upon two
sheets and on a scale of one inch for each two miles. This
chart contains 191 miles of the River Pachitea.

"10th. A chart of the River Palcazu, from its mouth to Port
Mairo, drawn upon one sheet and on a scale of one inch each
for two miles. This chart contains 37 miles of the River
Palcazu.

"11th. A chart of the Pechis river, from its mouth to the
termination of canoe navigation, drawn upon one sheet and on a
scale of one inch for each two miles. A part of the River
Herrera-yacu, and also a part of the River Trinidad, are
included in this chart, which contains 85 miles of the River
Pichis, 4 miles of the River Trinidad, and 5 miles of the
River Herrera-yacu.

"12th. A chart of the Peruvian Amazon river and its affluents,
drawn upon one sheet and on a scale of one inch for each 15
miles. This chart contains 1661 miles of the Peruvian Amazon
river and its affluents.

"13th. A chart of the River Ucayali and its affluents, draw