Note 89 — EL IDRISI COMPARED WITH EL BEKRI.
Reading edition
Major Rennell, in his ‘Memoir on the rate of Travelling as performed by Caravans’ (Phil. Trans. Vol. LXXXI. p. 144), concludes that in Africa fourteen geographical miles and five-sixths of horizontal distance, is the mean daily rate of loaded caravans. M. Walckenaer (Recherches, &c. p. 266,) adopts fifteen geographical miles as the ordinary rate.