According to an article in the Worthing Herald dated 27th October 2016, a ‘legend surrounds a tunnel while supposedly led from the (now-demolished) medieval Offington Hall to the Iron Age hill fort at Cissbury...
At Giant’s Cave, near Eden Hall, it has been the custom from time immemorial for the lads and lasses of the neighbouring villages to collect together on the third Sunday in May, to drink sugar and water, when the lasses give the treat: this is called Sugar-and-Water Sunday. They afterwards adjourn to the public house, and the lads return the compliment in cakes, ale, punch, etc.
Tradition says an iron chest of money is concealed: if any daring person ventures to approach the pond, and throw a stone into the water, it will ring against the chest ; and a small white figure has been heard to cry in accents of distress, ‘That’s mine’. [W Sparrow Simpson from Notes and Queries 1889 & County Folk-Lore: Suffolk (1893) Lady Camilla Gurdon]
The following treasure legend was published in Notes on the Folk-lore of the Northern Counties of England and the Borders by William Henderson (1879). ‘I learn from Mr. Robinson, of Hill House, Reeth, Yorkshire, that in his neighbourhood as in many others is a place called Maiden’s Castle, in which tradition avers a chest of gold is buried.