So Paul and I decided to publish. We wrote the paper, it was a rather long paper because in it, we not only described the phenomena that I've just described, but we described the virus spectrum of these cells which was the broadest known at that time. The cells seemed to be capable of replicating every known virus and some that were unknown, as I explained, at that time. But I still had one nagging problem and that nagging problem was that another senior personality in the field, a man by the name of Theodore Puck who was then working at the University of Colorado, a very well-known personality in the cell culture field – he had written a kind of mini text book on how to do culture, he had a course that was very popular outside of the national course and he had made some significant observations.

The reason I worried about what he had published is that he had been working also for years with normal human cells, yet this giant in the field had never found... had never had a clue to appreciate what had happened to my human cultures and my interpretation of those events. This was very puzzling and I didn't know him personally at all at the time and it was worrisome.