Non-fictionAfter some initial research, and only finding one historical reference to a ceremonial ground within the CBD, I confined the puzzle of Russell’s lacuna to the back of my mind. The single reference I found was in Bill Gammage’s book The Biggest Estate on Earth, where he writes: ‘A dance ground lay in or near dense forest east of Swanston Street and south of Bourke Street.’ Not a great lead because it was two blocks away from where it was depicted on Robert Russell’s survey.