We should like to thank the colleagues who work with us on this collaborative project, in particular, Celine Bressy, Aline Durand, Vanessa Py and Stéphane Renault. We have also benefited from the support and collaboration of numerous friends and students who have worked with us over the years. The following organisations provided financial support and/or support in kind for this work: The Parc National des Ecrins (who funded the laser scans in 2012), the Communauté des Communes du Pays des Ecrins, Ministère de la Culture, Service Régional de l'Archéologie (Provence-Alpes-Côte-d'Azur), Conseil Régiona Provence-Alpes-Côte-d'Azur, Conseil Général des Hautes-Alpes. We would also like to thank Paul Bahn, Penny Bickle, Martin Carver, Francesco Fedele and Mark Edmonds for their comments, and, finally, we are grateful to the Department of Archaeology at York who provided funds guaranteeing open access. A special thank you to Mickael Provost and Antoine Aigueperse of the Société Welience (Université de Borgogne) for the laser and white scans undertaken at 2,200m between storms.