What a weird investigation though. Sounds like they could have solved it by asking the photographer first, which they eventually did:
> Finally, Spark contacted Murray Close, the photographer who took the picture of Jack Nicholson that was inserted into the original image.
> The photographer revealed that "there was no such thing as the Warner Brothers photo archive [and] that was a complete mistake."
> Instead, Close had sourced the original photo from the BBC Hulton Photo Library in London, now part of Getty Images.
> The photo, it turns out, was taken at a Valentine's Day dance on February 14, 1921, in the Empress Ballroom at the Royal Palace Hotel in London.