It's a long time since I had a copy of Cooper's book but if I remember right it was put together posthumously from his notes. No excuse for not noting gaps in the notes of course but to be fair to Cooper himself we'll never know how he would have presented the information he had or whether he might have wished to carry out more intense tests prior to publishing a book himself (possibly during retirement). The thing which sticks in my mind is that his peer, Donald Sims (while not subscribing to Cooper's idea of the 'best' bee), wrote about him in a positive way.
Interesting conversation none the less.