The stone is now back in Northwood, where I next carve on 8th November. This image is from David Illman, who passed when looking for fungi near Long Beat.
Slindon resident, pumpkin expert and historian Robin Upton accounted: ‘the proper name is probably “Long Beech” Wood. Longbeat developed from the Shooting season, but there are several spellings which have all developed through mispronuciation or mishearing’. 
Long Beet is also used, which could have agricultural crop connections. Whatever the present spelling, it marks a surviving eastern remnant of the North Wood forest.
Another blog article and some lovely images of the stone at Bignor Hill by long distance walker Keith Foskett is here.
Slindon Sculpture 