Having failed to find a copy anywhere of "Light Vessels of the United Kingdom and Ireland", I did find the author Philip Simons. He very kindly photocopied two Cormorant-related pages from his copy of the book and this included a photograph we have not seen before - the ship moored where she is now, in Whitton Marina, Hoo in 1997 - taken by the then owner Terry Middleton. The mizzen is still in place and at the top are two objects which look very much like the riding light I featured in Chapter 27.
The other photo from Philip was one I featured some time ago when she was moored in Sittingbourne in 1991 and was in much better condition. That was taken by J.M.Anderiesse, although she was owned at that time by Charles Reece.