ISABEL. O 'twas such beautiful times as we did have down by the riverside,
him and me.
LUBIN. She would sit, her hand in mine by the hour of a Sunday afternoon.
[A pause during which LUBIN and ISABEL seem lost in their own sad
memories...]
ISABEL. And when I heared as 'twas to-morrow they were to wed, though
'twas like driving a knife deeper within the heart of me, I up and got me upon
the road and did travel along by starlight and dawn and day just for one look
upon his face again.
LUBIN. Twas so with me. From beyond Oxford town I am come to hurt myself
worse than ever, by one sight of the eyes that have looked so cruel falselinto
mine.
What theme does the author introduce with these lines?