I showed him one of the photos, one taken from the paperknife.    From Wordnik.com.  [Some by Fire]

He listened without interruption, playing with the ivory paperknife.    From Wordnik.com.  [The French Immortals Series — Complete] Reference

Cordwell stabbed the paperknife into the desk top and left it quivering.    From Wordnik.com.  [Hard Frost]

He seemed embarrassed and fiddled with his paperknife, looking anywhere but at Frost.    From Wordnik.com.  [Frost at Christmas]

The little judge rapped on the table with his paperknife and urged the reader afresh upon his wild career.    From Wordnik.com.  [The French Immortals Series — Complete] Reference

I wiped the powder from the paperknife, put it in an envelope with a note and posted it in the internal mail.    From Wordnik.com.  [Some by Fire]

Do not use too much paste, and crease the paper carefully along, and slightly into, the 'joint' with an ivory paperknife.    From Wordnik.com.  [The Book-Hunter at Home] Reference

He picked up his stainless-steel paperknife and tapped the blade on his palm, racking his brains for something to say in his inspector's favor.    From Wordnik.com.  [Frost at Christmas]

Hella is painting a paperknife in imitation of tarsia mosaic.    From Wordnik.com.  [A Young Girl's Diary] Reference

A paperknife fell from his hands and clattered on the glass top of the curio cabinet.    From Wordnik.com.  [Final Curtain]

He held an ivory paperknife, which he kept bending across his knee, and of a sudden the thing snapped in two.    From Wordnik.com.  [The Crown of Life] Reference

X., grasping an ivory paperknife savagely in his hand and tapping his blotting-pad to emphasize his words, "you're a pie!".    From Wordnik.com.  [The Clue of the Twisted Candle] Reference

Soames slowly passed a little inlaid paperknife over the smooth surface of a marqueterie table; then, without looking at his nephew, he began.    From Wordnik.com.  [The Forsyte Saga - Complete] Reference

Sir Francis had yawned capaciously once or twice, and had played absently with a large ink-stained paperknife, -- signs that his mind was wandering somewhat from the point at issue.    From Wordnik.com.  [The Treasure of Heaven A Romance of Riches] Reference

Page 184 the south window stood a small table covered with newly-opened letters, a portfolio, and several new books, with here and there a page turned down, and one with a paperknife between its leaves, as if it had only been half read.    From Wordnik.com.  [The American Fugitive in Europe. Sketches of Places and People Abroad. By Wm. Wells Brown. With a Memoir of the Author.] Reference

Says here they're off a paperknife.    From Wordnik.com.  [Some by Fire]

He snatched a paperknife and ripped.    From Wordnik.com.  [The Unicorn Trade]

The paperknife flew past his other shoulder.    From Wordnik.com.  [Unlikely Duchess]

"What about his paperknife, Inspector?".    From Wordnik.com.  [Some by Fire]

Has the paperknife escaped from its drawer?”.    From Wordnik.com.  [Maigret and the Spinster]