Leo and me

I arrived in Berkeley in 1957, at which time Leo was an Acting Assistant Professor of Mathematics here. He had recently proven the "individual ergodic theorem of information theory"---a triumph---and since this was becoming central to my own interests, it would have been natural for us to work together. However, Leo's interests shifted to more applied work, specifically statistics, and he soon moved to UCLA. So we never became collaborators, but we did became good friends, especially after 1980 when he returned to Berkeley as a Professor of Statistics.