He was too deeply hurt.

The disaster had been too great for any attempt on his part at repairing the old dwelling-places of his life.

His was not what we call a strong nature, but he was susceptible of very deep impressions.

He was fine and sensitive, rather than strong.
Rejected by his wife and family without a single interview with her or even an opportunity to assert his innocence, he felt the wrong so deeply that he could not get over it.

His love for his wife had been profound and tender, and when it became known to him that she had accepted the appearances of guilt as conclusive, and broken with her own hands the tie that bound them, it was more than he had strength to bear, and a long time passed before he rallied from this hardest blow of all.
Edith knew that her father had seen Granger after securing his pardon, and she had learned from him only, particulars of the interview.