". . . one of my favourite ghoulish tales comes via Rev. Archdeacon St. John D. Seymour, and concerns a bizarre entity once said to have haunted an Irish castle. Certainly, a handful of reports of phantom ape-men and spectral monkeys litter world folklore, and in the UK a scant few exist."This ghost/monster apparition was described as having a human head, yet "rest of the form belonged to a huge ape." !
Thanks to Nick Redfern at Man Beast UK for the link.