At first I found this system good but somewhat inadequate. E.g. does no. 1 contain two different glyphs and nos. 2 and 20 no less than six different glyphs. I therefore endeavoured to extend his system so that such ambiguities could be avoided. However, as time passed I became more and more frustrated with the glyphs: they seem do defer being sorted into numbered boxes. There are too many variants and - as we have seen - any little detail may be worth noting. So numbering glyphs is no good. Instead I have created a different system for cataloguing the glyphs, though still using Barthel's method by sorting after how they look. See glyph catalogue.