Waterhouse I think.
John W Waterhouse, best known for:
http://www.dtalesminiatures.com/My%20Sweet%20Rose-J.W.Waterhouse.jpg
http://www.ibiblio.org/wm/paint/auth/waterhouse/rose.jpg
ah... here's the one used for the bookcover:
http://www.20six.fr/pub/misterdids/lamia%201905%20Waterhouse.jpg