New DVD Version
Warner Brothers have released a new dvd version of this film in a double feature with the 1933 remake. Seems like it might be a decent restoration, at least compared to the other options available:
http://www.silentera.com/video/whiteSisterHV.html
http://www.wbshop.com/WAC-Double-Features-White-Sister-1923-1933/1000188630,default,pd.html
Worth checking out for this somewhat post-Griffith Lillian Gish film. I'll report back whenever I a get around to viewing it.