Janine maintained that the source of Flaubert's scruples was to be found in the relentless spread of stupidity which he had observed everywhere, and which he believed had already invaded his own head. It was (so supposedly once he said) as if one was sinking into sand. This was probably the reason, she said, that sand possessed such significance in all of Flaubert's works. Sand conquered all. Time and again, said Janine, vast dust clouds drifted through Flaubert's dreams by day and by night, raised over the arid plains of the African continent and moving north across the Mediterranean and the Iberian peninsula till sooner or later they settled like ash from a fire on the Tuileries gardens, a suburb of Rouen or a country town in Normandy, penetrating into the tiniest crevices. In a grain of sand in the hem of Emma Bovary's winter gown, said Janine, Flaubert saw the whole of the Sahara. For him, every speck of dust weighed as heavy as the Atlas mountains.

W.G. Sebald, The Rings of Saturn