Close to Upbrooks Farm it is met by Worston Brook and turns to the southeast.
Nearby it met by a small brook from Bracken Hey and the culvert of another at the Waterloo Bridge, as it enters the centre of Clitheroe.
[2] Mearley (also the name of the civil parish where the river begins) is thought to be from the Old English mǣre lēah, meaning the meadow or clearing at the boundary.
[3] Brook (OE broc) is a common name for a stream, most often found in southern and central England.
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