“This means that as far as the experimental”: Randall wrote to Franklin on December 4, 1950. He added: “I am not in this way suggesting that we should give up all thought of work on solutions, but we do feel that the work on fibres would be more immediately profitable and, perhaps, fundamental.” The letter is reproduced, eg, in Olby 1974, p. 346, and in Maddox 2002, p. 114. See also Klug 1968a, b.

“no doubt the brightest person”: Watson 1951, cited in Olby 1974, p. 354.

“The interest was that his [Watson’s] background”: Olby 1974, p. 310.

“I have never seen Francis Crick”: Watson 1980, p. 9.

“Jim was distinctly more outspoken”: Crick 1988, p. 64.