It would also appear from the Contents hereof, that a Joke, even between Husband and Wife, may be sometimes carried too far There are some men who, living with the one object of enriching themselves, no matter by what means, and being perfectly conscious of the baseness and rascality of the means which they will use every day towards this end, affect nevertheless—even to themselves—a high tone of moral rectitude, and shake their heads and sigh over the depravity of the world.
There are no more uses of "rectitude" in the book.
Show samples from other sources
Mr. Cunningham, a man of uncompromising rectitude, had given her a pint free of charge for having guessed his name yesterday, one of the tiny things she adored about Maycomb: people remembered their promises.
Harper Lee -- Go Set a Watchman
Now I sat down to write a different kind of letter, one that tried to convey how much she meant to me, how much she had taught me, how I wanted to emulate her rigor and rectitude, how much I loved her and missed her.