Lidwell Chapel, which was founded in the 13th century, survives as a ruin on Little Haldon. In the early 14th century, the hermit Robert de Middlecote used it as a base for robbing and murdering travellers. The building contains a holy well, which is now badly eroded.
According to legend, the well is said to be bottomless. The church and well is reputedly haunted by what locals call the Mad Monk - none other than Robert de Middlecote. Once a caring monk who was driven mad by the solitude, he murdered and robbed unwary travellers then threw the corpses down the well. Perhaps he is still intent on continuing his unholy mission in death...
For further information, please read Haunted Britain by Antony D. Hippisley Coxe.