Hi All Here is the first draft of the key to a Hydrological Cave Symbol Font for comment. I have put in four directional glyphs for each of the the flow indicators i.e. every 90 degrees. Is this good enough or should we have 45, 20,10 etc degree intervals? 10 degrees would consume 36 X 3 = 108 glyphs. This is viable but would push us beyond the use of the visible keys into using a soft font utilising insert commands. Also do you think the symbols should be free standing or should I put a border round them? I shall do a redraft of the Mines font next and will enhance the three shaft glyphs to show whether the shaft is in the floor or the roof of the passage. I will also put in some symbols for boreholes. Harry I