TQ 14 94
The London/Harrow/Hertfordshire boundary goes north east between Hartsbourne Golf Club and Grims Dyke open space. It goes south of a belt of woodland and along Greenacres.
Post to the west Hartsbourne Golf Club
Post to the east Bentley Priory
Post to the south Grimsdyke
Sites on the London, Harrow side of the boundary
Grimsdyke Open Space
All that is left of a big common. Managed by a Board of Conservators formed by an Act of Parliament in 1889.
Sites on the Three Rivers, Hertfordshire side of the boundary
Hartsbourne Golf and Country Club