The following text is from the original listed building designation:
EYNSFORD LULLINGSTONE LANE 1. 5280 Lullingstone Ruins of Bath House TQ 56 SW 5/70 at Lullingstone Castle II 2. C18. Rectangular brick bath about 12 ft long by 8 ft wide surrounded by brick and flint and oval-shaped wall now ruined but rising to a height of about 8 ft. This is situated on the banks of the River Darenth which provided the water.
Listing NGR: TQ5301664385

Description from record TQ 56 SW 120:
Possible brick bath house, or folly, close to the River Darent. Named after Queen Anne who used to visit Lullingstone Castle (TQ 56 SW 18). In a ruinous state and now, 2003, nolonger marked on maps. Just visible on 1999 Kent CC aerial photograph survey.(1-2)

<1> Pittman, S., 1983, Lullingstone Park: The Evolution of a Medieval Deer Park (Monograph). SKE11893.

<2> Pittman, S, 2003, Additional information from Susan Pittman concerning Lullingstone Park (Unpublished document). SKE11937.