CUNUYACU. Latitude, 9 deg. 5' 52" south; longitude, 74 deg. 48' 15" west of Greenwich; magnetic variation, 8 deg. 59' 26" east; elevation above sea-level, 557 feet; distance from the Atlantic, 2951 miles; current, 2-1/2 miles per hour; width of the river, 400 yards. Cunuyacu means hot water, and is descriptive of the place, for there are here several thermal springs welling up from the sand beach. At Chunta Isla, between the mouth of the Pachitea and Cunuyacu, the Cashibo Indians frequently attack from ambush strangers who are ascending the river. INCA ROCA. Latitude, 9 deg. 9' 4" south; longitude, 74 deg. 55' 45" west of Greenwich; magnetic variation, 8 deg. 6' 26" east; distance from the Atlantic, 2963 miles; current, 2-1/2 miles per hour. Inca Roca is a rocky beach overhung by sandstone cliffs sixty-five feet high; on the face of the cliffs are carved numerous figures, amongst them the figure of the sun and of the Llama are conspicuous, hence the place was named Inca Roca. CONFLUENCE OF THE PALCAZU AND PICHIS RIVERS. Latitude, 9 deg. 54' 9" south; longitude, 74 deg. 58' 45" west of Greenwich; magnetic variation, 7 deg. 34' 4" east; elevation above sea-level, 518 feet; distance from the Atlantic, 3082 miles; current, 2-3/4 miles per hour. At the junction of the Palcazu and Pichis, the two rivers forming the Pachitea, there is high land suitable for a town or post. LIST OF DISTANCES ON THE PACHITEA RIVER. Miles. Mouth of the Pachitea to Cunuyacu 60 Cunuyacu to Inca Roca 12 Inca Roca to confluence of the Pichis and Palacazu 119 From the confluence of the Pichis and Palacazu, forming the Pachitea river, to the Atlantic 3082 PALACAZU RIVER. The Palacazu is a somewhat narrow stream, with a current of 3-1/4 miles per hour and a depth which at low water will permit a steamer drawing seven feet of water to ascend to Puerto del Mairo. PUERTO DEL MAIRO. Latitude, 9 deg. 55' 22" south; longitude, 75 deg. 17' 45" west of Greenwich; thermometer, 75 deg.; elevation above sea-level, 795 feet; distance from the Atlantic, 3119 miles; current, 3-1/2 miles per hour. Puerto del Mairo is 45 miles distant from the large city of Huanaco, which has constant communication and trade with Lima. At present the route between Huanaco and Puerto del Mairo is only a footpath through the forest, but it is probable that a good road for pack-mules could be constructed at little expense, and that a railway is not impracticable. PICHIS RIVER.