"I think one who has suffered much." About whom is the Bishop talking?

“I think one who has suffered much.” About whom is the Bishop talking? Why has he suffered?

The Bishop is talking about the convict. He has suffered because his wife died due to starvation and then he was imprisoned for ten years for a small crime.
Further, he was given bad and stale food in prison, made to sleep on hard boards, kept chained and beaten up when he complained.