Charles Mackay, Memoirs of Extraordinary Popular Delusions…
“ This was the crisis of the delirium. In the midst of it, the chief actor made his appearance, waving his wand, like Prospero, to work new wonders. Dressed in a long robe of lilac-coloured silk, richly embroidered with gold flowers, bearing in his hand a white magnetic rod; and, with a look of dignity which would have sat well on an eastern caliph, he marched with solemn strides into the room. He awed the still sensible by his eye, and the violence of their symptoms diminished. ”
