And now they came upon one of the most satisfying sights on which the human eye can ever rest. Here and there, in the depressions at either side of the road, there had been a thin scurf of green, which meant that water was not very far from the surface. And then, quite suddenly, the track dipped down into a bowl-shaped hollow, with a most dainty group of palm-trees, and a lovely green sward at the bottom of it. The sun gleaming upon that brilliant patch of clear, restful colour, with the dark glow of the bare desert around it, made it shine like the purest emerald in a setting of burnished copper. And then it was not its beauty only, but its promise for the future: water, shade, all that weary travellers could ask for. Even Sadie was revived by the cheery sight, and the spent camels snorted and stepped out more briskly, stretching their long necks and sniffing the air as they went. After the unhomely harshness of the desert, it seemed to all of them that they had never seen anything more beautiful than this. They looked below at the green sward with the dark, star-like shadows of the palm-crowns; then they looked up at those deep green leaves against the rich blue of the sky, and they forgot their impending death in the beauty of that Nature to whose bosom they were about to return. The wells in the centre of the grove consisted of seven large and two small saucer-like cavities filled with peat-coloured water, enough to form a plentiful supply for any caravan. Camels and men drank it greedily, though it was tainted by the all-pervading natron. The camels were picketed, the Arabs threw their sleeping-mats down in the shade, and the prisoners, after receiving a ration of dates and of doora, were told that they might do what they would during the heat of the day, and that the Moolah would come to them before sunset. The ladies were given the thicker shade of an acacia tree, and the men lay down under the palms. The great green leaves swished slowly above them; they heard the low hum of the Arab talk, and the dull champing of the camels, and then in an instant, by that most mysterious and least understood of miracles, one was in a green Irish valley, and another saw the long straight line of Commonwealth Avenue, and a third was dining at a little round table opposite to the bust of Nelson in the Army and Navy Club, and for him the swishing of the palm branches had been transformed into the long-drawn hum of Pall Mall. So the spirits went their several ways, wandering back along the strange, un-traced tracks of the memory, while the weary, grimy bodies lay senseless under the palm-trees in the Oasis of the Libyan Desert. CHAPTER VIII.