His next play, a long monodrama, A Stretch of the Imagination, is regarded by most connoisseurs as his finest work, embodying a radical advance in the character of Australian theatre, embracing and remoulding as it does many of the strong strands in theatrical modernism. In 1976 it was performed by Max Gillies of the APG, for which he reprised his role in the 1990 TV movie version. It was the first Australian play to be staged in China (in Mandarin) with a famous Chinese actor, Wei Zongwan, as Monk. This play has enjoyed productions in the United States, Germany and New Zealand. In 2010 it was performed in London by Mark Little, a winner of the prestigious Laurence Olivier Award.
