Throwback 24 years to a visualisation of the Waimakariri River, produced as part of my PhD research, that was used as the cover image (front and back) for the New Zealand Hydrological Society’s ‘Gravel-Bed Rivers V’ book, edited by M. Paul Mosley. This book contains the Proceedings of the 5th International Gravel-Bed Rivers Workshop, held at Christchurch and Franz Josef Glacier, New Zealand, from 29 August to 2 September 2000, and reflected international progress in the broad field of gravel-bed rivers between 1995 and 2000. I recently rediscovered it whilst sorting through boxes in the garage….