Hughes
Ascending, begin with A in the innermost circle, D being its root. The Key-note A becomes the root of E, E becomes the root of B, and so on. Descending, take theKey-note A in the outermost circle. D, the root of A, becomes the fifth lower Key-note, and G its root, and then G becomes the Key- note, and C its root. The same remarks concerning the writing of the meeting fifths, which are made below the corresponding diagram of the major gamut, apply to this one. [Harmonies of Tones and Colours, Diagram Shews the Modulating of the 12 Minor Keys, page 41e]