A brilliantly useful comment from a reader brings this map: http://strangemaps.wordpress.com/2008/06/05/284-londons-lost-rivers/
and comes at a time when I'm told that the now Jubilee Line Underground was going to be the Fleet Line on the basis that it was going to go through Fleet Street and reflected something of the line of the Fleet River...
Sounds convincing, but any confirmations out there?
Ed Fordham
