His integrity was perfect; it was a law of nature with him, rather than a choice or a principle; nor can it be otherwise than the main condition of an intellect so remarkably clear and accurate as his to be honest and regular in the administration of affairs.
He had begun an investigation, as he imagined, with the severe and equal integrity of a judge, desirous only of truth, even as if the question involved no more than the air-drawn lines and figures of a geometrical problem, instead of human passions, and wrongs inflicted on himself.
…I saw in him—as evidently as the indestructible ramparts of Old Ticonderoga, already cited as the most appropriate simile—was the features of stubborn and ponderous endurance, which might well have amounted to obstinacy in his earlier days; of integrity, that, like most of his other endowments, lay in a somewhat heavy mass, and was just as unmalleable or unmanageable as a ton of iron ore; and of benevolence which, fiercely as he led the bayonets on at Chippewa or Fort Erie, I take to…
In that old day the English settler on these rude shores—having left king, nobles, and all degrees of awful rank behind, while still the faculty and necessity of reverence was strong in him—bestowed it on the white hair and venerable brow of age—on long-tried integrity—on solid wisdom and sad-coloured experience—on endowments of that grave and weighty order which gave the idea of permanence, and comes under the general definition of respectability.
There are no more uses of "integrity" in the book.