 The historical parish covered an area of .Its northern border with Croydon (formerly Croydon-cum-Clapton) and Arrington followed the River Cam, and its western border with Wendy was marked by the North Ditch.The parish's straight eastern boundary with Whaddon follows the Roman Ermine Street (now the A1198), and its southern border with Bassingbourn and Abington Pigotts largely follow field boundaries.