Tyburn (Charing Cross), along Fleet Street and over the Fleet Bridge, climbing Ludgate Hill (by gravitational pressure) to a public conduit at Cheapside. Water was supplied free to all comers. Tyburn had significance from ancient times and was marked by a monument known as "Oswulf's Stone", which gave its name to the Ossulstone Hundred of Middlesex. The stone was covered over in 1851 when Marble Arch was moved to the area, but it was shortly afterwards unearthed and propped up against the Arch. It has not been seen since 1869. For much of its history, public executions took place at Tyburn,
River Tyburn Avenue in Hampstead. Between St James's Park and Buckingham Palace the waters divided to create two distributaries, creating Thorney Island on which Westminster Abbey was built. Enclosed by concrete, bricks, parks and roads the Tyburn flows through underground conduits for its entire length, including one underneath Buckingham Palace and its course has been used for local sewers which connect to the London sewerage system. Marylebone Lane (W1), which defies the grid pattern of streets, follows the course of the Tyburn on what was its left bank through Marylebone village. From its source at the Shepherd's Well near Fitzjohns Avenue in