'In Deep Time Dreaming: Uncovering ancient Australia, Billy Griffiths describes the process of imagining the past through the traces and sediments of archaeology as ‘an act of wonder – a dilation of the commonplace – that challenges us to infer meaning from the cryptic residue of former worlds’. In his endeavour to infer meaning from this cryptic residue, Griffiths begins his wondering by sifting through the evidence, insights, enthusiasms, and mistakes of an articulate band of Cambridge-trained archaeologists who, from the 1960s, professionalised what had been the province of amateurs. Led by John Mulvaney, they halted the indiscriminate gathering of artefacts and human remains, brought rigorous techniques to the excavation of sites, and began to strip back the layers of time, aeon by aeon, to reveal the astonishing antiquity of human presence on the Australian continent.' (Introduction)