Thrice hath the Fast of Ramadan come and gone since the Granter of Requests last allowed my eyes to behold the well-remembered landscape, scarcely visible in the pale light of dawn. Hills, covered with tall feathery palms, rose abruptly from the barren, sun-scorched plain, and, at their foot, stood the dazzlingly-white city of Omdurman, the impregnable and mysterious headquarters of Mahdiism, while beyond, like a silver ribbon winding through the marshes, the Nile glided, half veiled by its thin white cloud of morning vapours.