Talk Material Matters: A Panel Discussion Moderated by John Slyce, with guests Sachin Kaeley, Neal Rock and Karin Ruggaber. 04 Oct 2016 Save / follow I've seen this Comment on Material Matters: A Panel Discussion Moderated by John Slyce, with guests Sachin Kaeley, Neal Rock and Karin Ruggaber. Share Material Matters: A Panel Discussion Moderated by John Slyce, with guests Sachin Kaeley, Neal Rock and Karin Ruggaber. with your friends Griffin Gallery London, United Kingdom