Nicknamed ‘la fée brune’ (the brown fairy), opium may be less colourful than its friend absinthe, ‘the green fairy’, but it is no less intriguing. Imported from China by sailors in the 19th century, it became widely used in brothels in the port cities of France. But it wasn’t long before this ‘midnight oil’ became the fashionable drug of choice in the French capital. In the glorious years of the Parisian belle époque and then afterwards in the Golden Twenties (or as the French called them, les années folles, the ‘mad years’) opium use seized the artistic circles of society. Infamous opium users include Charles Baudelaire and André Malraux, who…