
In fact, S. M. Simpson, eventually devised an efficient 24-point Fourier
transform, which was a precursor to the Cooley-Tukey fast Fourier transform
in 1965.  The FFT made all of Simpson's efficient autocorrelation and
spectrum programs instantly obsolete, on which he had worked half a lifetime.
		-- Proc. IEEE, Sept. 1982, p.900
