David Livingstone,
A Popular Account of Dr Livingstone's Expedition to the Zambesi and its Tributaries…
(1894)
“ Garden Island, when the river is low, commands the best view of the Great Fall chasm, as also of the promontory opposite, with its grove of large evergreen trees, and brilliant rainbows of three-quarters of a circle, two, three, and sometimes even four in number, resting on the face of the vast perpendicular rock, down which tiny streams are always running to be swept again back by the upward rushing vapour. ”
