Robert Schomburgk, when visiting the small mountainous country of the Majonkongs, on his route to Esmeralda, was fortunate enough to determine the species of Arundinaria, which furnishes the material for these blowing-tubes. He says of this plant: “It grows in large tufts, like the bambusa; the first joint rises, in the old cane, without a knot, to a height of from 16 to 17 feet before it begins to bear leaves. The entire height of the Arundinaria, growing at the foot of the great mountain-cluster of Maravaca, is from 30 to 40 feet, with a thickness of scarcely half an inch in diameter. The top is always inclined; and this species of grass is peculiar to the sandstone mountains between the Ventuari, the Paramu (Padamo), and the Mavaca. The Indian name is Curata, and, therefore, from the excellence of these celebrated long blowing-tubes, the Majonkongs and Guinaus of these districts have acquired the name of the Curata nation.”[II] Footnote 61: p. 159—“_Fabulous origin of the Orinoco from a lake_.” The lakes of these regions (some of which are wholly imaginary, while the real size of others has been much exaggerated by theoretical geographers) may be divided into two groups. The first of these groups comprise those situate between Esmeralda (the most easterly mission on the Upper Orinoco), and the Rio Branco; to the second, belong the lakes presumed to exist in the district between the Rio Branco and French, Dutch, and British Guiana. This general view, of which travellers should never lose sight, proves that the question of whether there is another Lake Parime eastward of the Rio Branco, besides the Lake Amucu, seen by Hortsmann, Santos, Colonel Barata, and Schomburgk, has nothing whatever to do with the problem of the sources of the Orinoco. As the name of my distinguished friend the former Director of the Hydrographic Office at Madrid, Don Felipe Bauza, is of great weight in questions of geography, the impartiality which ought to influence every scientific investigation makes it incumbent on me to mention that this learned man was inclined to the view that there must be lakes west of the Rio Branco, at no great distance from the sources of the Orinoco. He wrote to me from London shortly before his death, “I wish you were here that I might converse with you respecting the geography of the Upper Orinoco, which has occupied you so much. I have been fortunate enough to rescue from entire destruction the papers of the General of Marine, Don José Solano, father of the Solano who perished in so melancholy a manner at Cadiz. These documents relate to the settlement of the boundary line between the Spaniards and Portuguese, with which Solano had been charged since 1754, in conjunction with the Escadre Chef Yturriaga and Don Vicente Doz. In all these plans and sketches I find a Laguna Parime sometimes as a source of the Orinoco, and sometimes as wholly detached from it. Are we then to assume that there is another lake further eastward to the