A lost river

Diamond Geezer: Three of London's lost rivers, and arguably three of the most important, began their descent in Hampstead. They're the Westbourne, the Tyburn and the Fleet, and from here they each ran roughly southwards and roughly parallel down to the Thames. The Westbourne was the westernmost of this trio, the west stream, or "west bourne". Several streamlets joined forces on the upper slopes to form the river proper, joining together by Kilburn to form what was once a fairly substantial watery presence. There's lots and lots and lots and lots more stuff about the Westbourne. Pictures too. You'll love it. See you Monday.