I suppose the process of holding multiple mathematical expressions in one’s head when deriving equations is common for those with expertise in this area, but it was new to me. I tell this anecdote because I enjoyed doing these and sub- sequent calculations using the model, but also because it echoes a story I read a while ago about Isaac Newton during the time he was developing calculus. The story I recall is that the staggering genius of Newton was reflected in his apparent ability to hold several mathematical expressions in his brain simultaneously for days at a time, while walking around in London or on his mother’s farm, as he meshed them together until the problem of interest was solved. Having been able to retain only three expressions for probably less than a second with considerable effort, I was amazed by this account of an incomprehensible talent of an unquestioned genius. The preceding was intended to describe some of the activities that went into our early contributions to research on specific aspects of the bacterial division cycle. It is not comprehensive and it only reflects our work and not those of numerous others whose studies during the same time frame all contributed to the accomplishments in this field in the late 1960s.