A nice feature of Mayfair are the Victorian shopping arcades. They were built in the 19th century for refined ladies to go shopping without getting their shoes dirty. In those days the streets were covered in horse dung and dog muck and there were no pavements to speak of. The arcades were protected by guards called Beadles who would stop any unwanted or boisterous behaviour – which included running, singing, and children in general. Even whistling was banned, as it was thought that pickpockets whistled to communicate with each other.