which happened not to be of interest at the time ceased to be copied and mostly disappeared. On the book roll and its gradual replacement by the codex see William A. Johnson, "The Ancient Book", in _The Oxford Handbook of Papyrology_ , ed. Roger S. Bagnall, Oxford, 2009, pp 256-281, 6(http://google.com/books?id=6GRcLuc124oC&pg=PA256).
Addendum (June 9)
Arie Altena wrote a [report from the
panel](http://digitalpublishingtoolkit.org/2014/05/off-the-press-report-day-
ii/) published on the website of