Lives remembered: The Very Rev Professor Henry Chadwick
They are all worth reading, but I loved this in particular from Canon Tim Roper:
Henry would arrive, panting, straight from the hockey field, at 4.02 for a 4pm supervision. In his rooms he used to dash behind a screen while we sat demurely. “Prophesy!” he would call, and we would read our essays to a blank screen from which emerged sounds of one changing. Finally, Henry would appear, dapper as ever, and deliver himself of learned thoughts about Bultmann, form-criticism, or whatever. Thirty years later I met him. He still remembered.And for "Smite the Amalekites", you'll have to go to the article.
See also Death of Henry Chadwick, More on Henry Chadwick and Henry Chadwick: More Lives Remembered.