Alleyways have a habit of leading to unexpected places.

Alleyways have a habit of leading to unexpected places.

They act as the city's library: echoing the routes of trade,

lost rivers, burial roads, disputed boundaries, tracks of

animals and people. They hold the stories of a city that

otherwise can no longer be seen. This map, by Matthew

Turner, with original photography by Nigel Green, is

an entry point to this story, introducing the hidden

passages of London.