An appreciation of John's work is published in www.isama.org/hyperseeing June 2007. I have also published an I hope provocative article on `Promoting Mathematics' in MSOR Connections Vol 7, No 2, May 2007 downloadable from http://mathstore.ac.uk/newsletter/may2007/pdf/24_brown_r_promotingmaths.pdf It has some Grothendieck quotations and a theme is promoting mathematics to students! MSOR would I think welcome further debate and argument. Ronnie Brown