Thursday 28th December We drive with Toyotas along the Messak Settafet (stones desert) border. Snack between desert acacias, I don't eat any food because I have a bad gastric intollerance with blood spots vomit. We stop by the holy tree of a Marabout (an Islam sage), they say that by touch the tree's bark people can recover. I was hopeful that it works also for turists and, in fact, I must admit that after touching the bark the stomach pain disappears.