The paintings of white lilies painted by a popular noble painter get damaged at Bath, a famous hot spring in England.  Feeling that he's seen the painting before, William goes to Bath, where he is reunited with Sherlock, who happened to be there to investigate the case.
then I'll keep on turning out pieces,
as your ghost painter.
werde ich als dein Geist weitermalen.
Yo seré tu pintor fantasma
hasta que tú quieras.
je les peindrai et les signerai
en utilisant ton nom.