It gratified Mrs. Penniman to be able to feel conscientiously that this scene virtually removed the interdict which Catherine had placed upon her further communion with Morris Townsend.
Mrs. Montgomery resumed her meditations, and her visitor, who was prepared to give time to the affair, asked himself whether, in spite of her little conscientious air, she was not playing into her brother’s hands.
Of course you have done it conscientiously; you have made yourself believe that I can be tired out.
He was perhaps right, after all, to think as he did; by which Catherine meant not in the least that his judgement of Morris’s motives in seeking to marry her was perhaps a just one, but that it was probably natural and proper that conscientious parents should be suspicious and even unjust.
There are no more uses of "conscientious" in the book.