Re #236
Alexander - you need to understand the construction of the Heights which isn't obvious 'from the ground'
Taking the Drop Redoubt for example, the fort isn't a solid lump of chalk with walls around it.
They dug the moats and took the excavated materials and built up the ground level inside the fort, therefore natural (and solid chalk) ground level is within the fort with the walls holding back huge amounts of compacted spoil so the brickwork is vital to the structural integrity of the moats (which is why the foundations of the Pharos are so deep inside)
This pattern is repeated all around Folkestone Road side of the sites as there is hardly a natural ground level anywhere, in fact when they likely lopped off the top of the hill to create the flat plateau they probably took the village of Braddon with it and it now forms the remparts above Clarendon
