The Oasis of Siwa, luxuriant exception in the harsh, arid desert. Vanilla absolute. A stretch of green lost in an endless sea of sand. Cinnamon leaf essence. Narrow ochre and yellow-hued streets, clay lace vestiges, houses with brightly coloured doors. Narcissus absolute. The radiant greens of olive trees and palm leaves, the browns and violets of sun-dried dates. Incense essence. Siwa, a mirage, a bottomless well of desired visions.