in The Histories) during an excavation of the sunken Egyptian port city of Thonis-Heracleion lends credence to Herodotus's travels and storytelling. Herodotus' contribution to the history and ethnography of ancient Egypt and Africa was especially valued by various historians of the field (such as Constantin François de Chassebœuf, comte de Volney, W. E. B. Du Bois, Pierre Montet, Martin Bernal, Basil Davidson, Derek A. Welsby, Henry T. Aubin). Many scholars explicitly mention the reliability of Herodotus's work (such as on the Nile Valley) and demonstrate corroboration of Herodotus' writings by modern scholars. A. H. L. Heeren quoted Herodotus throughout his work and provided corroboration by scholars regarding several passages (source of the Nile, location of Meroë, etc.). Cheikh Anta Diop provides several examples (like the inundations of the Nile) which, he argues, support his view that Herodotus was "quite scrupulous, objective, scientific for his time." Diop argues that Herodotus "always distinguishes carefully between what he has seen and what he has been told." Diop also notes that Strabo corroborated Herodotus' ideas about the Black Egyptians, Ethiopians, and Colchians. Martin Bernal has relied on Herodotus "to an extraordinary degree" in his controversial book Black Athena. British egyptologist Derek A. Welsby said that "archaeology graphically confirms Herodotus's observations." To further his work on the Egyptians and Assyrians, historian and fiction writer Henry T. Aubin used Herodotus' accounts in various passages. For Aubin, Herodotus was "the author of the first important narrative history of the world." Scientific reasoning On geography Herodotus provides much information about the nature of the world and the status of science during his lifetime, often engaging in private speculation likewise. For example, he reports that the annual flooding of the Nile was said to be the result of melting snows far to the south, and he comments that he cannot understand how there can be snow in Africa, the hottest part of the known world, offering an elaborate explanation based on the way that desert winds affect the passage of the Sun over this part of the world (2:18ff). He also passes on reports from Phoenician sailors that, while circumnavigating Africa, they "saw the sun on the right side while sailing westwards", although, being unaware of the existence of the southern hemisphere, he says that he does not believe the claim. Owing to this brief mention, which is included almost as an afterthought, it has been argued that Africa