He wondered what made them so hardhearted and their children so bold.

To tell the truth, Boreas was not as hardhearted as he looked.

In the end, I was not hardhearted enough to prolong the silence.

Crack my son over the head, will you, you hardhearted, murtherin' divil?

You are bound to think me hardhearted; but that is not the case.

I'm not a hardhearted New Yorker: I'm acting with random kindness.

Even hardhearted sinners left their work and came to these meetings.

That hardhearted Lord --seemed to be diverted by the scene.

Miss Genie was frankly unconventional, and yet she was both hard-headed and hardhearted.

A hardhearted creditor was turning him out of his farm.

Hear me, O ye hardhearted, who are far from justice.

I feel as hardhearted, as hard-faced, as the recording angel at the end of days.

But neither of these hardhearted men must be absolved at the expense of the other.

The hardhearted man granted to the entreaties of his children what compassion would not bestow.

But I reckon it's a judgment of some kind on me that they're so hardhearted.

In all fairness, Maskelyne is more an antihero than a villain, probably more hardheaded than hardhearted.