THE PIRATE GHOST OF POLPERRO CAVE

A businessman of the name John Dyer captured an image on his camera during 2015 within a cave on a trip to Polperro, a fishing village in Cornwall, England. Locals claim that the image captured is that of a supposed ghost of an 18th century pirate known as Captain William Wilcox, aka Willy Wilcox, who operated around the area. According to legend, while on the run Wilcox fled into a nearby cave, but had become trapped as the tides began to rise; and drowned within. In some variants, he was not fleeing from authorities, but instead was in the process of hiding contraband within when he became trapped. Allegedly, his “wailing cries can sometimes be heard issuing from the cave.”
Dyer’s captured image features what appears to be shadowy figure down the tunnel, that some have claimed is nothing more than an oddly shaped rock formation that slightly resembles a man, but many believe that it is indeed an apparition of William Wilcox. When viewing the photo, look for what appears to be an 'eyepatch' over what would be his right eye. The cave has in recent years seemingly become known as “Willy Wilcox’s Cave” or the “Willy Wilcox Hole.”
I’ve attempted to look deeper into the tales of a William Wilcox, but only could find the same information regarding the photograph that generated buzz online post-2015 and a brief mention of the legend prior to the photograph in the 2013 book “Magical Places of Britain” by Rob Wildwood. I’d be grateful to anyone who’s aware of Wilcox’s folklore in the Cornwall area.