when he should have

[jasonlulu_2000]

In spite of her deeply-rooted dislike, she could not be insensible to the compliment of such a man’s affection, and though her intentions did not vary for an instant, she was at first sorry for the pain he was to receive; till, roused to resentment by his subsequent language, she lost all compassion in anger. She tried, however, to compose herself to answer him with patience, when he should have done. He concluded with representing to her the strength of that attachment which, in spite of all his endeavours, he had found impossible to conquer; and with expressing his hope that it would now be rewarded by her acceptance of his hand.

What does the underlined part mean in this context?

Thanks for your help!

Yours
Jason

 

[Matthew Wai]

... when he should have answered her with patience.

 

[GoesStation]

The underlined phrase could be written when he finished talking in modern English. Done means "finished" in this context.