They date back to 1875 and Henry Croft, the municipal road sweeper and rat-catcher of Somers Town market, near King's Cross. Inspired by the flash outfits of the local costermongers, Croft decided to decorate an outfit head-to-foot in pearl buttons. The idea was to draw attention to himself and raise money for charity. He proved so successful that soon there was a pearly family for every London borough.