Dan Quinn, Bill Bardeen, Marge Bardeen, Isi Donietz, Helen Quinn. This hike began in sunlight and happiness. The weather worsened; we got lost for a while. At the end of the day we were very happy for any extra gear people had packed, and any extra energy folks had to help those losing strength. Roberto probably took this photo. This 1991 hike took place long after Roberto and Helen's seminal work on what is now known as Peccei-Quinn Symmetry.