The Seven Pillars of Wisdom, p 276.
“All day the grey-green expanse of stones and bushes quivered like a mirage with the movement of men on foot; and horsemen; men on camels; camels bearing the hunched black loads which were the goat-hair tent-cloths; camels swaying curiously, like butterflies, under the winged and fringed howdahs of the women; camels tusked like mammoths or tailed like birds with the cocked or dragging tent-poles of silvery poplar.”