Such a dramatic house may not be the most inconspicuous hiding spot for your mistress — but then again William Randolph Hearst was not a subtle man. 6697 Whitley Terrace, with Robert Vignola at left In 1923, the media tycoon built this Mediterranean villa on Whitley Terrace to stash actress Marion Davies, who he allowed to live here with her favorite director, Robert G. Vignola. The trio had collaborated several times on films for Hearst’s Cosmopolitan Productions, including