Hello, everyone! Since not everyone is a visual artist, I thought that this might be useful. The British Library has generously uploaded these images into the public domain. More info: https://www.digitalartsonline.co.uk/news/illustration/british-library-over-milli...
Actual images, all spooky categories. https://www.flickr.com/photos/britishlibrary/albums/72157659990533249