Her high moral sense revolted at the low social tone of Khartum, and she left it with gladness to begin the ascent of the White Nile, and carry out the objects she had proposed to herself. It was pleasant to gaze on the fair landscapes which lined the banks of the great river. Its serene loveliness charmed her, and she compared it, not inappropriately, to Virginia Water, the picturesque miniature lake which shines amid the foliaged depths of Windsor Forest. Pleasant to look upon were the dense groups of shapely trees: palms, mimosas, acacias, the gum-tree--which frequently rivals the oak in size--and the graceful tamarisk. Myriads of shrubs furnish the blue ape with a shelter; the air sparkles with the many-coloured wings of swarms of birds. On the broad bright bosom of the stream spread the large leaves and white flowers of colossal lilies, among which the crocodile and hippopotamus pursue their unwieldy pastime. How marvellous the effects of colour, when this romantic scene is flooded in the glowing sunshine. Through the transparent air every object is seen with a sharp, clear outline, and the sense of distance is overcome. When a shadow falls it is defined as boldly as on canvas; no generous mist softens or conceals it; everything is shown as frankly as in a mirror. In the noontide heats all nature is as silent here as in the virgin forests of the New World; but when the cool breath of evening begins to be felt, and that luminous darkness which is the glory of a summer night in Central Africa folds softly over the picture, the multiform life of earth swiftly re-awakens; birds and butterflies hover in the air, the monkeys chatter merrily, and leap from bough to bough. The sounds which then arise--song and hum and murmur, the roll of the river, the drone of insects, the cries of the wild beasts--all seem to blend in one grand vesper harmony--one choral hymn of thanksgiving to the Lord of life. These are generally hushed as the night advances; and then swarms of fire-flies and glow-worms light their tiny torches and illuminate the dark with a magical display; while the drowsy air hangs heavy with the sweet and subtle odours exhaled from the corollas of the plants which open only in night's cool and tranquil hours.