ADDITIONAL NOTES. XV reality the older trunk road of the Hittite kingdom, whose capital, Boghaz-Kevi, lay in the bend of the middle Halys. In all prob- ability the regular Persian posting road was identical with the Graeco-Roman road described further down p. 90 in the text. Herodotus may have been misled by the fact that in 481-480 B.C, Xerxes' Grand Army made use of the more northerly route. See W. M. Calder, Classical Review, 1925, pp. 7-11. P. 95. Dumb commerce The scene of these silent negotiations was probably in Sene- gambia. The same manner of conducting business was observed on the West African coast by medieval travellers, and even by explorers of the early nineteenth century. P. 96,1. 26. The Troglodyte Aethiopians Herodotus also knew of two other Aethiopian peoples, (i) The Sudanese negroes, of whom he had no doubt seen specimens during his stay in Egypt (3. 17-23). In eulogising these as a long-lived and finely built race he may have been influenced by Homer (editor's note to pp. 26-27); but his description of them was not far wide of the mark. Herodotus believed that African Aethiopia stretched to the south-western border of Ocean (3.114). This was probably an inference from the story of the Nasamones (pp. 96, 97 of the text), who had met with a negro population in the region of the Niger. (2) The dark-skinned but lank-haired pre-Aryan races of Sind and Beluchistan (7.70). Occasional Greek travellers under the aegis of the Persian king Darius might have had sight of these. Pp. 96, 97. The expedition of the Nasamones The track of the Nasamones probably lay southward to the oasis of Aujila, thence south-west across the oasis of Murzuk and Asben (to the west of L. Chad). The city by the Niger may have been Timbuctu, from which the Niger is believed to have receded in the last two thousand years. Pp. 99-101. The circumnavigation of Africa Herodotus' story has been carefully analysed by W. Miiller, Die Umsegelung Afrikas durch phonikische Schiffer, and E. H. Warmington, in Gary and Warmington, The Anwnt Explorers, ch, 5. T. 25