MOUTH OF THE HERRERAYACU RIVER.
Latitude, 10° 20' 3" south; longitude, 74° 54' west of Greenwich; magnetic variation, 7° 59' 26" east; distance from the Atlantic, 3156 miles.
The Herrerayacu river was named after the major who commanded the escort of soldiers accompanying the Hydrographical Commission; it has a current of 3-1/2 miles per hour, and is navigable for canoes a distance of four or five miles, up to Terminacion Playa in latitude 10° 22' 33" south; longitude, 74° 54' west of Greenwich. Mountain ranges are plainly in sight from Terminacion Playa, which is 3160 miles distant from the Atlantic.
PUERTO TUCKER.
Latitude, 10° 22' 55" south; longitude, 74° 49' west of Greenwich; magnetic variation, 9° 7' 30" east; elevation above sea-level, 700 feet; distance from the Atlantic, 3167 miles; current, 3-1/2 miles per hour.
Puerto Tucker was named after the President of the Hydrographical Commission. It is at the head of canoe navigation, not far from the source, of the Pichis river; from it a range of lofty mountains, distant some twenty or thirty miles, bears from S. to S.W. This range must be the eastern Cordillera of Peru.
LIST OF DISTANCES ON THE PICHIS RIVER.
| Miles. | |
| Mouth of the Pichis to the Atlantic ocean | 3082 |
| Mouth of the Pichis to Rochelle Isla | 18 |
| Rochelle Isla to mouth of Trinidad river | 10 |
| Mouth of Trinidad river to Tempestad Playa | 13 |
| Tempestad Playa to mouth of the Herrerayacu | 33 |
| Mouth of the Herrerayacu to Puerto Tucker | 11 |
| Puerto Tucker to Atlantic ocean | 3167 |
FOOTNOTES
[2] The latitudes, longitudes and other data given in these notes are taken from the journal of the Peruvian Hydrographical Commission of the Amazon. Some of them have been published, by permission, in the third edition of Professor Orton's "Andes and the Amazon."