I was one of a few who conducted a discussion on the "My Brighton & Hove" website over Radynden when we were interested in The Prince of Wales Dairy. You may like to eves-drop the messages section and the 'Places' section of that same website.
My colleague Andy wrote:
I have never found any explicit reference that would indicate the exact whereabouts of the manor, but in 1441 it was recorded as consisting of the house, a dovecote, 132 acres of arable land and 300 acres of pasture. The last change of ownership was in 1794, when it was sold to William Stanford. It is somewhat pointed that Dunvan, Horsfield and Parry make no reference to this manor, implying that it had ceased to exist by 1800...
Andy & I then went on to discuss things further off list, and tried to establish exactly where the boundaries of that estate once were, (Lovers Walk being one of them). Andy was a key factor in the discussion with many facts to his fingertips, so you may find dropping him a line via 'My Brighton Messages' could prove invaluable.
What I also find so fascinating is that after 600 years, the descendents of the doves from the former dovecote still cluster on just one of the nearby roofs. Take a look sometime. Roy G