‘Never had a penny of his own in his whole life, that I know of,’ replied Squeers.
— from Nicholas Nickleby by Charles Dickens

Living in delicate seclusion, some in furnished flats, others in Renaissance villas on Fiesole’s slope, they read, wrote, studied, and exchanged ideas, thus attaining to that intimate knowledge, or rather perception, of Florence which is denied to all who carry in their pockets the coupons of Cook.
— from A Room with a View by E. M. (Edward Morgan) Forster

That the dog behaves in this way is matter of observation, but that it "knows" or "remembers" anything is an inference, and in fact a very doubtful one.
— from The Analysis of Mind by Bertrand Russell

'No, nothing that I knows on,' replied the man, pulling on his gloves.
— from Oliver Twist by Charles Dickens

“I never was sane, that I know of,” returned he.
— from Roughing It in the Bush by Susanna Moodie

“No, not that I know of,” replied Mrs. Norris; “she was here a moment ago.”
— from Mansfield Park by Jane Austen

No, not that I know of," replied Holmes.
— from The North Pacific: A Story of the Russo-Japanese War by Willis Boyd Allen

“I’m missing nothing that I know of,” replied Mr. Fabian; then Polly came to his rescue and changed the conversation.
— from Polly and Her Friends Abroad by Lillian Elizabeth Roy

The first that I knew, or rather the first that I heard about the firing by the police upon the troops was contained in this dispatch to Mayor McCarthy: "One of my men was murdered by your police force as we marched up Penn avenue, en route for Sharpsburg.
— from Report of the Committee Appointed to Investigate the Railroad Riots in July, 1877 Read in the Senate and House of Representatives May 23, 1878 by 1877 Pennsylvania. General Assembly. Committee Appointed to Investigate the Railroad Riots in July

This suggests the two important kinds of reasoning; namely, inductive and deductive.
— from A Class Room Logic Deductive and Inductive, with Special Application to the Science and Art of Teaching by George Hastings McNair

Fil smiled and said: “Though I believe you know without asking me, I shall tell you to show that I know our romantic and interesting history.
— from Fil and Filippa: Story of Child Life in the Philippines by John Stuart Thomson

“Nothing that I know of,” replied the other little girl.
— from The Brownie Scouts and Their Tree House by Mildred A. (Mildred Augustine) Wirt

Napoleon, too, was very fond of children, and would carry the infant King of Rome in his arms, and standing in front of a mirror, make all kinds of grimaces in the glass.
— from Royalty in All Ages The Amusements, Eccentricities, Accomplishments, Superstitions and Frolics of the Kings and Queens of Europe by T. F. (Thomas Firminger) Thiselton-Dyer

“Not that I know of,” replied Mike, beginning to scent the truth.
— from The Launch Boys' Adventures in Northern Waters by Edward Sylvester Ellis

"Upon my word, none that I know of," replied Mrs. James.
— from Amelia — Volume 3 by Henry Fielding

"Not that I know of," replied the postmaster.
— from Down the River; Or, Buck Bradford and His Tyrants by Oliver Optic