How it all Came Round by L.T. Meade

At this time Jasper Harman was a very perplexed man. Unlike his brother John, he was untroubled by remorse. Though so outwardly good-tempered and good-natured, his old heart was very hard; and though the arrows of past sins and past injustices might fly around him, they could not visit the inner shrine of that adamantine thing which he carried about instead of a heart of flesh within him.

What the painful process must be which would restore to Jasper Harman the warm living heart of a little child, one must shudder even to contemplate. At present that process had not begun. But though he felt no remorse whatever, and stigmatized his brother as an old fool, he had considerable anxiety.