One of the higher-profile victims† of Covid-19 has been mathematician John Conway, best known to most people for the invention of the cellular-automata game he called “Life”. This article <https://arstechnica.com/science/2020/04/john-conway-inventor-of-the-game-of-life-has-died-of-covid-19/> has some details, including a link to a YouTube video showing a quite amazing configuration of 6 “engines” that generate an endless stream of “Corderships” that go sailing off in one direction. †Another victim I personally feel sad about is Tim Brooke-Taylor. But while I enjoyed his humour (for example in “The Goodies” and “At Last, The 1948 Show” on TV, and “I’m Sorry, I’ll Read That Again” on radio), I can’t think of anything appropriate to this group to say about him...