Richard Hamming would often give this lecture when he traveled to another university. I was in grad school in 1979 when he showed up to give this talk at the University of Illinois (his alma mater). He chose to give his talk in a lounge rather than a formal lecture room, and it was remarkable because he not only spoke but he listened intently to the students. I remember asking him whey he had settled in Monterey California, and he said he had traveled all over the earth but decided there was no place prettier than Monterey. He was wonderfully warm and insightful.