When John found out, ashamed at the actions of his son he felt duty bound to return to captivity.

I felt duty bound to Jim to take care of them.

Yet, I feel duty bound to point out that the man's authority was never at issue.

The rest of us, however, felt duty bound to remain.

He'd tried to end it again when he felt duty bound to marry.

A few weeks later he felt duty bound to explain his position in detail.

Jack's duty bound him to the ship, however, and he stood watching through his telescope.

"The court reached only those issues it felt duty bound to reach," she said in a prepared statement.

If there's good reason for doubt about personal behavior, reporters may feel justified, even duty bound, at least to check it out.

But given the fact that the anomaly had first appeared on her watch, she'd felt duty bound to see the quest through to its end.