[Footnote 13: Whether it be true as some maintain (amongst others M. Prax, “Commerce de l’Algérie, 1849,” p. 13.), that the name mithkál is a corruption of “medical,” a term used to denote the small weight used for medical purposes, I am not able to decide. I always thought that it was derived from ثَقَلَ.] [Footnote 14: M. Prax, p. 12. of the little pamphlet just mentioned in the preceding note, is totally wrong in supposing the mithkál of Timbúktu equal to half a duro, or Spanish dollar, or two fr. sixty cents. The very lowest price is just double.] [Footnote 15: There are some interesting articles of gold represented by Lord Fitzclarence in the work above mentioned.] [Footnote 16: See El Bekrí, ed. de Slane, p. 174:— يبدل الملح فيها بالذهب In another passage (p. 183.) he describes the commerce of Gógó in the words:— وتجارة اهل بلد كوكوا بالملح وهو نقدهم “The commerce of Gógó consists of salt, and salt is their standard currency.”] [Footnote 17: See Caillié’s Travels to Timbuctoo, ii. p. 119; and about Tegháza, or, as he writes, Trasas, or Trarzas, p. 128.] [Footnote 18: El Bekrí, p. 171. In the time of Ébn Haukál (a. H. 960) the salt was brought from Aúlíl to Aúdaghost.] [Footnote 19: El Bekrí, p. 173:— وتبايع اهل سلي بالذرة والملح وحلق النحاس وازر لطاف من قطن يسمونها الشكيات - الازر المسماة بالشكياتن] [Footnote 20: Caillié, Journey to Timbúctoo, ii. p. 33.] [Footnote 21: P. 96. Here Jackson states the average size of such a caravan at 10,000 camels; and even the more cautious M. Gråberg de Hemsö repeats these statements in his “Specchio di Morocco,” p. 144. seq. “Ciononostante (le caravane) conducono talvolta seco _da 16 fino a 20 mila cammelli_.”] [Footnote 22: Gråberg de Hemsö, Specchio di Morocco, p. 146. Besides slaves, he enumerates as articles of export from Timbúktu to Morocco, ivory, rhinoceros horns, incense, gold dust, cotton strips (? verghe), jewels, ostrich feathers of the first quality, gum copal, cotton, pepper, cardamom, asafœtida, and indigo.] CHAP. LXXI. DIARY CONTINUED.