This diagram has been developed from John Harrison's clockface diagram , on the only page found from his missing manuscript. The colours have been selected on the basis of frequency to wavelength as described in the colours chapter of Pitch, Pi, ....... . The length of the lines from the centre of the pattern for each note represent the position of each note along the spiral of fourths and fifths. If an expanding spiral line were to be drawn joining all the notenames in sequence of fifths from Gbb through to D## (Dx), the resultant pattern would produce the shape described in the recipe instructions for a physical model of LucyTuning, of a conical spiral as viewed from one end.