As I wrote on the Web page , I saw Dr. Spencer only twice; once in Kyoto, and once at the former National Beureau of Standards, USA. On both of these occasions, however, he was very kind to me. So I'll never forget his hospitality. I also learned much from his excellent publications on the penetration of fast electrons through matter for doing my research work. When I saw him for the first time, I was surprised to find the person who did wonderful calculations did not have one of the arms (possibly it was the right one). I do not know how he lost his arm.
- Lewis V. Spencer, IDEA & ISAAC Web site (2005).