"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, drawn upon one sheet and on a scale of one inch for each 15 miles. This chart contains 1284 miles of the River Ucayali and its affluents.
"All the above mentioned charts are drawn upon 35 sheets, each sheet being 30 inches long and 15 inches broad.
"14th. A chart of the Peruvian Amazon river and its affluents, drawn upon one sheet and on a scale of one inch for each ten miles, the sheet being 5 feet long by 5 feet broad. This chart contains, on one single sheet, all the surveys made by the Hydrographical Commission of the Amazon. The other charts give the same surveys more in detail.