“When you discover something or observe something for the first time, you... wonder how that works, and then you make one, and you look at it, and you decide you'd better find out how it works. ...[Y]ou set about a detailed series of experiments, and eventually, ...you have to do the sums, it wouldn't be respectable without doing the sums... [Y]ou do the sums and then you publish it as a paper in the learned society journal. ...[Y]ou write it as if it was done from the front, as if on morning one you said "I will now invent the magnetic river..." ...[T]his very unfortunate phrase keeps coming in, "Now it is cleat that..." and "Clearly, obviously..." None of it is obvious. It wasn't the day before you started. No, you do it from the back.”
EL