In acknowledgment of Sir David Cox's passing, we would like to invite the IBS membership to contribute stories of their interactions with Prof. Cox over the span of his remarkable career, starting the thread with a personal account of the former IBS president, Clarice Demétrio. "Encouraged by Gauss M. Cordeiro(UFPE) and with a grant from a Brazilian research funding agency, CNPq, I went for a post-doctorate at Imperial College in London, from February 1986 to September 1987, under the supervision of Sir David Cox, known for his great contributions to theoretical and applied statistics. It was difficult for me at the beginning, with problems of adaptation ...