“Now, Master Andres,” said the farmer, “call on the undoer of wrongs; you will find he won’t undo that, though I am not sure that I have quite done with you, for I have a good mind to flay you alive.”
— from The History of Don Quixote, Volume 1, Complete by Miguel de Cervantes Saavedra

“Still,” said the colonel, getting up and frowning at his boots, “I am not sure that I understand.”
— from The Innocence of Father Brown by G. K. (Gilbert Keith) Chesterton

Do not accompany them to the dressing-room, and never stop them in the hall for a last word.
— from The Ladies' Book of Etiquette, and Manual of Politeness A Complete Hand Book for the Use of the Lady in Polite Society by Florence Hartley

He had been exiled to Asia, but only for a short time, for, as he told me, the cabals are not so tenacious in Turkey as they are in Europe, and particularly at the court of Vienna.
— from The Memoirs of Jacques Casanova de Seingalt, 1725-1798. Complete by Giacomo Casanova

I am not sure that I believe in the derivation; I have heard the disgraceful suggestion that “educator,” if applied to a Roman schoolmaster, did not mean leading our young functions into freedom; but only meant taking out little boys for a walk.
— from What's Wrong with the World by G. K. (Gilbert Keith) Chesterton

‘Father, if you had known, when we were last together here, what even I feared while I strove against it—as it has been my task from infancy to strive against every natural prompting that has arisen in my heart; if you had known that there lingered in my breast, sensibilities, affections, weaknesses capable of being cherished into strength, defying all the calculations ever made by man, and no more known to his arithmetic than his Creator is,—would you have given me to the husband whom I am now sure that I hate?’
— from Hard Times by Charles Dickens

The nightingale, full-toned in middle May, Hath ever and anon a note so thin It seems another voice in other groves; Thus, after some quick burst of sudden wrath, The music in him seemed to change, and grow Faint and far-off.
— from Idylls of the King by Tennyson, Alfred Tennyson, Baron

And now, so that I'm properly instructed in this matter, tell me what's been happening so far." K. instantly began telling his uncle about what had been happening, holding nothing back - being completely open with him was the only way that K. could protest at his uncle's belief that the trial was a great disgrace.
— from The Trial by Franz Kafka

I am asked, but I am not sure that I shall be able to go.
— from Life of Lord Byron, Vol. 3 With His Letters and Journals by Thomas Moore

As for me, I don't think I gave much attention to it, and I am not sure that if it had at all interfered with my own life I should not have been rather jealous!
— from My New Home by Mrs. Molesworth

Then at last the parting came, and tall, brown-eyed, buxom Julie kissed and was kissed by everybody, and everybody shook hands with me, and wished me luck, and I felt as if I was one with them, although I had never seen them in my life before, and never saw them in my life again.
— from A Woman's Experiences in the Great War by Louise Mack

They included pupils of the sixth, seventh, and eighth grades, students in high school and normal school, teachers in the public schools, an association of business men, and a convention of boards of education.
— from The World War and What was Behind It; Or, The Story of the Map of Europe by Louis Paul Bénézet

'Oh, you are very nice, Octavio ,' replied Sylvia , 'in your punctilio to Philander ; but I perceive you are not so tender in those you ought to have for Sylvia : I find honour in you men, is only what you please to make it; for at the same time you think it ungenerous to betray Philander , you believe it no breach of honour to betray the eternal repose of Sylvia .
— from Love-Letters Between a Nobleman and His Sister by Aphra Behn

A certain Dr. Encausse, in giving a lecture before the Society for Psychical Research at Nancy, said that in 1889, having heard that a professional magnetizer named Robert was able to put a subject into such a state of hypnosis that he could project lines of writing on paper without use of pen or pencil, he was curious to see the [Pg 222] performance.
— from The Shadow World by Hamlin Garland

“You may have changed your opinions since the sun rose, gentlemen,” said Hermona; “but I am not sure that I have.”
— from The Hour and the Man, An Historical Romance by Harriet Martineau