Thanks to Rhona LEE for the information below
The Summerhouse, Joydens Wood in 1919
Photo and following description taken from Ian Hammertons booklet 'A Wood On Our Doorstep Joyden's Wood' published in 1998.
'Some elderly people remember as children on Sunday afternoon walks visiting a curious structure near the top of the hill in Summerhouse Drive. It may have been simply a shelter for those enjoying a day's shooting in the woods - there was evidence of iron rings in the walls for the tethering of animals while the owners partook of a collation, but there is reference to a structure in the 1600s.'