Distance from the Atlantic, 1825 miles; current, 4-1/2 miles per hour; depth of water, 36 feet; width of river, 800 yards.
Tabatinga is the Brazilian frontier post on the north side of the Amazon. Captain Azevedo, of the Brazilian Navy, gives the latitude of this place as 4° 14' 30" south; longitude, 70° 2' 24" west of Greenwich; magnetic variation, 6° 35' 10" east.
LETITIA.
Latitude, 4° 10' 57" south; longitude, 69° 59' 21" west of Greenwich; magnetic variation, 5° 57' 40" east; elevation above sea-level, 274 feet; distance from the Atlantic, 1828 miles.
Letitia is the Peruvian frontier post on the north bank of the Amazon. A fort, intended to command the passage of the river, was projected but not erected at this point. It is probable that the passage of steamers up the Amazon cannot be stopped by forts and batteries at any point on the river below Tamshiyacu.
LORETO.
Latitude, 3° 54' 20" south; longitude, 70° 7' 45" west of Greenwich; magnetic variation, 5° 11' 24" east; thermometer, 78°; elevation above sea-level, 286 feet; distance from the Atlantic, 1865 miles; current, 3 miles per hour; width of river, 1300 yards.
Loreto is the most eastern Peruvian town of any importance on the Amazon. It is situated on the north or left bank of the river. Near it resides a tribe of Indians, partly civilized, called the Ticunas.
CAMACHEROS.
Situated on the right or south bank of the river; current 2-1/4 miles per hour; width of river, 1800 yards.