the aperture or posting slot. It is hinged, should display the royal cypher of the monarch who was reigning at the time of installation, and may also be fitted with a collection plate showing the times of collection from that location. It is fitted with a brass security lock on the inside. The contractor for these locks has been the Chubb Locks company for many years. They are five-lever locks and each one can exhibit more than 6,500 combinations. There is no skeleton key for these locks. Each post box has its own set of keys and postal workers have to carry large bunches with them when clearing the boxes. The carcass or body of the box supports the door and cap, and may protrude substantially down below ground level. This provides security and stability to the pillar box. There is a wirework cage inside to prevent mail falling out when the door is opened, a hinged letter chute to allow mail to fall into the collecting bag or sack, and a serrated hand-guard to prevent unauthorised tampering with the mail through the aperture. History Pre-history Before the introduction of pillar boxes, in the UK, it was customary to take outgoing mail to the nearest letter-receiving house or post office. Such houses were usually coaching inns or turnpike houses where the Royal Mail coach would stop to pick up and set down mails and passengers. People took their letters, in person, to the receiver, or postmaster, purchased a stamp (after 1840) and handed over the letter. Channel Islands problem The advent of the British wayside letter box can be traced to Sir Rowland Hill, Secretary of the Post Office, and his Surveyor for the Western District, and noted novelist, Anthony Trollope. Hill sent Trollope to the Channel Islands to ascertain what could be done about the problem of collecting the mail on a pair of islands. The problems identified in the Channel Islands were caused by the irregular sailing times of the Royal Mail packet boats serving the islands due to weather and tides. Trollope subsequently arrived in Jersey in the early Spring of 1852 and proceeded to survey both islands. His recommendation back to Hill was to employ a device he may have seen in use in Paris: a "letter-receiving pillar". It was to be made of cast iron, about 1.5 metres high, octagonal in design and painted olive