I shall not here relate the numerous enterprises which were undertaken for the conquest of this imaginary country. Unquestionably we are indebted to them in great part for our knowledge of the interior of America; they have been useful to geography, as errors and daring hypotheses are often to the search of truth: but in the discussion on which we are employed, it is incumbent on me to rest only upon those facts which have had the most direct influence on the construction of ancient and modern maps. Hernan Perez de Quesada, after the departure of his brother the Adelantado for Europe, sought anew (1539) but this time in the mountainous land north-east of Bogota, the temple of the sun (Casa del Sol), of which Geronimo de Ortal had heard spoken in 1536 on the banks of the Meta. The worship of the sun introduced by Bochica, and the celebrity of the sanctuary of Iraca, or Sogamozo, gave rise to those confused reports of temples and idols of massy gold; but on the mountains as in the plains, the traveller believed himself to be always at a distance from them, because the reality never corresponded with the chimerical dreams of the imagination. Francisco de Orellana, after having vainly sought El Dorado with Pizarro in the Provincia de los Canelos, and on the auriferous banks of the Napo, went down (1540) the great river of the Amazon. He found there, between the mouths of the Javari and the Rio de la Trinidad (Yupura?) a province rich in gold, called Machiparo (Muchifaro), in the vicinity of that of the Aomaguas, or Omaguas. These notions contributed to carry El Dorado toward the south-east, for the names Omaguas (Om-aguas, Aguas), Dit-Aguas, and Papamene, designated the same country--that which Jorge de Espira had discovered in his expedition to the Caqueta. The Omaguas, the Manaos or Manoas, and the Guaypes (Uaupes or Guayupes) live in the plains on the north of the Amazon. They are three powerful nations, the latter of which, stretching toward the west along the banks of the Guape or Uaupe, had been already mentioned in the voyages of Quesada and Huten. These two conquistadores, alike celebrated in the history of America, reached by different roads the llanos of San Juan, then called Valle de Nuestra Senora. Hernan Perez de Quesada (1541) passed the Cordilleras of Cundirumarca, probably between the Paramos of Chingasa and Suma Paz; while Felipe de Huten, accompanied by Pedro de Limpias (the same who had carried to Venezuela the first news of Dorado from the land of Bogota), directed his course from north to south, by the road which Speier had taken to the eastern side of the mountains. Huten left Coro, the principal seat of the German factory or company of Welser, when Henry Remboldt was its director. After having traversed (1541) the plains of Casanare, the Meta, and the Caguan, he arrived at the banks of the Upper Guaviare (Guayuare), a river which was long believed to be the source of the Orinoco, and the mouth of which I saw