Thanks Windell for the fast reply.
Two follow-on questions:
– any suggestions on how I might get hold of a more complete glyph table?
– … and if I did, would I need to change anything else? From a quick look at the code, it seems that characters outside the range 32 to 127 are being excluded programmatically (lines 72, 84 in hershey.py) – so presumably this would also need adjusting if new glyphs are added ?
All help greatly appreciated!