http://adsabs.harvard.edu/full/1977JHA.....8..113C was the article I was reading about it, but forget the exact page. I'm sure the researcher that had done a lot of computer simulations of the ancient night sky was called Hawkes or Hawkins though.
Hello Branwen,
Was this Gerald Hawkins? I believe he was Professor of Astronomy at Harvard at one time. Don't know if he's still there.