The following remarks from the report of Sir Robert Schomburgk throw some light on the subject in question. “The lake of Amucu,” says this traveller, “is without doubt the nucleus of the Lake of Parime and of the supposed White Sea. In December and January, when we visited it, it was scarcely a mile in length, and was half covered with reeds.” The same observation occurs on D’Anville’s map of 1748. “The Pirara flows from the lake to the W.N.W. of the Indian village of Pirara and falls into the Maou or Mahu. The last-named river rises, according to the information given me, north of the ridge of the Pacaraima mountains, which in their eastern portion do not attain a greater elevation than about 1600 feet. The sources of the river are on a plateau, from whence it is precipitated in a beautiful waterfall, known as the Corona. We were on the point of visiting this fall, when on the third day of our excursion to the mountains, the indisposition of one of my companions compelled me to return to the station at the lake Amucu. The Mahu has black coffee-coloured water, and its current is more impetuous than that of the Rupunuri. In the mountains through which it pursues its course it is about 60 yards in breadth. Its environs are here extremely picturesque. This valley as well as the bank of the Buroburo, which flows into the Siparuni, are inhabited by the Macusis. In April the whole Savannahs are overflowed, and then present the peculiar phenomenon of the waters belonging to two different river basins commingling together. It is probable that the vast extent of this temporary inundation may have given rise to the fable of the lake of Parime. During the rainy season a water communication is formed in the interior of the country between the Essequibo, the Rio Branco, and the Gran Para. Some groups of trees, rising like Oases on the sand-hills of the Savannahs, present, at the time of the inundation, the appearance of islands scattered over a lake; and these are without doubt the Ipomucena islands of Don Antonio Santos.”