[quote:5081eed2ce="mowgli"]How many scars does Susan have?[/quote:5081eed2ce]

The copy of Soul Music I have just finished (re)reading says three.

Edited to add:

While going through The Art of Discworld to check something for another thread (Greebo) I noticed that the pictures of Susan show three scars, but one group picture seems to show her with three, but Mort with four!