Scholar and artist John Clegg made a pioneering contribution to the study of rock art. He was the first in the Australian academy to teach rock art research as a dedicated subject (Sydney University 1965-2000), supervising the first graduate students with such specialty, subsequently supporting their careers. He is honoured here for much more than his novelty and the contributions in this monograph pay homage to the late John Kay Clegg's diverse influence. Rock art researchers from around the globe traverses topics such as aesthetics, the application of statistical analyses, frontier conflict and layered symbolic meanings, the deliberate use of optical illusion, and the contemporary significance of ancient and street art. They cover rock art assemblages from Columbia, South Africa, Europe and across Clegg's beloved Australia. They interrogate descriptive and analytic concepts such as repainting, memorialisation and graffiti, as well as questioning the ethical impactions of research practices touching rock art as a part of its study. The tributes in this book are necessarily as individual as the man they honour, and John Clegg was certainly an individual. The longevity of ideas and perspectives Clegg brought to the pursuit of rock art research is demonstrated in this collection of works. Clegg's continued relevance is testament to the value and magnitude of his contribution. He is a deserving subject for a Festschrift.