In this desert there are mountains of sand, and when the wind rises, it covers the caravans and many die from suffocation. Those that escape bring back with them copper, wheat, fruit, all manner of lentils, and salt. And from thence they bring gold and all kinds of jewels.
-The Itinerary, Benjamin of Tudela (1130-1173)
This does not sound like anything the drovers carried, except for the salt, and the lentils if by that Benjamin meant millet. No gold, copper, fruit or jewels, although after forty days of eating asīda I would have taken the fruit, especially if it were fresh, over the gold and jewels.