The ‘Readers Digest Folklore Myths and Legends of Britain’ suggests that the dyke is haunted by a spectral ‘White Lady’. I can’t find any more on her, but did notice on the map that there is a spring called the Gell/Gel-Spring at the southern end of the dyke – and white ladies are often associated with springs and water. Can ‘gell’ mean girl? Or is the fact it is an old word for ‘leech’ more significant? Or perhaps it’s just like the word ‘gill’ for a narrow stream.