From the Wikipedia page [1] Stamford Brook is a tributary of the River Thames which is the confluence of two smaller streams, arising in West London, flowing into Hammersmith Creek on the Tideway. One of the streams arose on Old Oak Common north east of the Old Acton Wells and flowed south down Old Oak Common Road and Old Oak Road. The second, known locally as The Warple ran just west of Horn Lane and south down Warple Way, named after the stream. It turned into Ravenscourt Park and fed the former moat there.