> The ducks in St. James' Park are so used to being fed bread by secret agents meeting clandestinely that they have developed their own Pavlovian reaction. Put a St. James' Park duck in a laboratory cage and show it a picture of two men—one usually wearing a coat with a fur collar, the other something somber with a scarf—and it'll look up expectantly. The Russian cultural Attachés black bread is particularly sought after by the more discerning duck, while the head of M19's soggy Hovis with Marmite is relished by the connoisseurs.

Good Omens, by Terry Pratchett and Neil Gaiman