This map of 1870 shows where Bew's Corner is:
It is the junction with Dulwich Common and Lordship Lane, where the Harvester now is.
The earliest pub was The Green Man, founded some 300 years ago. An early landlord was John Cox, who was given permission to cut a path through Dulwich Woods to the top of Sydenham Hill, probably hoping to attract custom from visitors to Sydenham Wells. The path is still known as Cox's Walk.
The Green Man ceased to be an inn by the end of the 18th century when it became a school, called Glennie's Academy. It was here that Lord Byron was a pupil, before going to Harrow.
After the school closed a surviving part of the building became a pub, licensed to someone called Bew. In 1863 it was rebuilt and called The Grove Tavern. In 1923 it was rebuilt again.