Chapter 10. ‘It would have been a big rolling dune but for the rocky ridges either side, but it looked firm and well packed and the Merc's run at it and the auto transmission's butter-smooth gear changes gave precisely the smooth torque delivery required to sail to the top and on. As I reached the top and eased the wagon over my hopes were again dashed. Not only was there another ridge right up against and facing the one I had just crossed but the valley between the two was, to my right, a cul-de-sac so that my only option was to turn sharp left and exit along the resulting narrow passage. Worst of all, it was heading 297º, almost 180º off the desired steer for Issedienne. I was going in the opposite direction.’

Chapter 15. ‘The rock art before me had that effect and produced an unstoppable welling of tears in my eyes. I sat back on the ground and just stared almost in disbelief. I reasoned much later that there was every indication that this had not been previously seen by outsiders – what we arrogantly call 'discovery', as though nothing exists until a white man in a pith helmet has clapped eyes on it.’

Chapter 8. ‘At last after another mile or so, the implacable barrier of hills ahead, Wadi 'N' revealed the little wadi to the south, the right turn at the bend by a rounded hill. I checked the GPS that had faithfully recorded the weaving path this far and showed in enlarged figures the bearing and distance to the wadi's entry point, now only a mile and a half off.
I raised my eyes from the GPS to look ahead between the narrow walls of the entry wadi and couldn't believe what I saw.’