In one of P.G. Wodehouse's stories, a man explains his hangover as charcoal poisoning, from the powdered charcoal used to color inferior caviar. I had never hea

In one of P.G. Wodehouse's stories, a man explains his hangover as charcoal poisoning, from the powdered charcoal used to color inferior caviar. I had never heard of such an explanation outside his fiction before.