River Thames Thames Estuary), the river is subject to tidal activity from the North Sea. Before the lock was installed, the river was tidal as far as Staines, about upstream. London, capital of Roman Britain, was established on two hills, now known as Cornhill and Ludgate Hill. These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing was built at the site of London Bridge. London Bridge is now used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later than
Queen Elizabeth II domestic rate stamp (Canada) Queen Elizabeth II domestic rate stamp (Canada) The Queen Elizabeth II domestic rate stamp is a definitive stamp issued by Canada Post, and bearing the image of Elizabeth II, Queen of Canada. Seven versions of the stamp have been issued since 2003. Canada has depicted its sovereigns on stamps since 1851; that tradition continues into the present day. Since 1939, the image of Queen Elizabeth II has appeared on 59 stamps issued in Canada, most of them definitives. Canada Post spokesperson Cindy Daoust was quoted as stating that stamps bearing the image of the Queen now "outsells other stamps, ten