He knelt down and tried to pray, but somehow it didn't seem as if the prayer came from his heart, and his thoughts began instantly to wander far away.

Still he knelt--knelt even until his candle had gone out, and he had nearly fallen asleep, thought-wearied, on his knees.

And then he got into bed still dressed.

He had been making up his mind that he could bear it no longer, and would run away to sea that night.
He waited till eleven, when Dr.Rowlands took his rounds.

The Doctor had been told all the circumstances of suspicion, and they amounted in his mind to certainty.