bold = Main text
  Book, Chapter        grey = Comment text

1   III,     XIII     |       very elements join in the proof. The unwonted force of the
2   III          (207)|        measure of distance is a proof that the writer was near
3    IV,      XXI     | bringing of honour to them as a proof of the inclination of the
4    IV          (299)|     statement has been taken as proof that the author wrote after
5    IV,    XXIII     |        28).~ ~I could also give proof to you of that insidious
6    IV,      XXX     |       the light, by receiving a proof of light in his seeing the
7    IV,      XXX     |        the sun, and by having a proof of darkness in his not seeing