The observation by Bozler, Bernier, Gully, Richardson and Lee of Cornell University (Phys. Rev. Lett., 32, 875; 1974) of a longitudinal nuclear magnetic resonance at the frequency which had been predicted by Leggett of the University of Sussex (ibid., 31, 352; 1973) suggests that theory is again starting to catch up with experiment in attempting to reach an understanding of superfluid 3He.