Watching brief by P Harp of Plateau during drainage works revealed a well. The well mouth was constructed with unmortared flint and research suggests that the well was capped in the late 18th or early 19th century. It is believed to date from at least the mid-18th century but may be considerably earlier.
North Downs Plateau Archaeological Research Group
A resistivity survey, directed by C Bagnall of Plateau and undertaken in 2015, on the top of the mound, recorded areas of high resistivity that may indicate the presence of building foundations.
Excavation by P Harp and S Hill of Plateau of the interior of the tower ahead of National Trust work to the Grade II Listed folly. A fill, to a depth of c 0.9m above external ground level, was revealed. The lower 0.3m of the fill produced quantities of unknapped flint, a few fragments of Horsham stone and two unfrogged, yellow bricks. The flints and stone probably originate from the structure, although no mortar was observed adhering to them.