514 



ward of the Randal des Guaharibos (nor. laL 

 1° 15' long. 67° 380, join the chain of Paca- 

 raina (Pacarahina, Pacaraymo, Baracayna), 

 which divides the waters of the Carony and the 

 Rio Branco, and of which the micaceous schis- 

 tus, resplendent in their silvery lustre, became so 

 important in the fable of the Dorado of Ra- 

 legh*. The part of that chain containing the 

 sources of the Oroonoko has not yet been ex- 

 plored ; but its prolongation more to the east, 

 between the meridian of the military post of 

 Guirior and the Rupunuri, a tributary stream of 

 the Essequibo, is known to me-f-by the tra- 



* Vol. v, p. 797, 798, 841, 857. 

 + The following is a list of the unpublished materials 

 on which I found my description of the eastern part of the 

 Sierra Parime : 1° Journal of Nicolas Hortsman (1740) found 

 among d'Anville's papers (Vol. p. 594, 791), and com- 

 municated by his heirs. 2° Written notes (1778) dictated by 

 Santos, when he passed from the missions of Carony to the 

 plains of Rio Branco, crossing the chain of Pacaraina, which 

 he calls Pacaraymo (Vol. v, p. 572, 839, 840). This manu- 

 script, and the following, are preserved in the archives of 

 Nueva Guayana, whence I took copies. 3° Journal of Don Ni- 

 colas Rodriguez, the friend of Santos,from Barcelonetta to the 

 confluence of the Rio Mao (Mahu), and the Rio Branco, I 

 traced a map on the very accurate indications of rhumbs and 

 distances contained in this valuable manuscript. 4° Two very 

 detailed maps of the captain of the frigate, and the astrono- 

 mical geographer of the Portugueze commission of the 

 boundaries, Don Antonio Pires de Sylva Pontes Leme, and the 

 captain of engineers, Don Ricardo Franco d' Almeida de 



