This is a comprehensive collection which comprises papers relating to Williamson's professional and personal life. The kernel of the collection consists of drafts of plays such as The coming of the stork, The removalists, Don's party, Jugglers three, What if you died tomorrow, The department, A handful of friends, The club, Travelling north, The perfectionist, Sons of Cain, Celluloid heroes, Emerald City, Siren, Top silk, Dead white males, After the ball, Corporate vibes, Face to face, The great man, A conversation, Up for grabs, Soulmates and Birthrights. Scripts for film and television work such as Peterson, Certain women, Gallipoli and The last bastion are also included along with correspondence, photographs, diaries, fan mail, receipt books, juvenilia and memorabilia.