His tone sharpened as he went on.

Her tone had sharpened, and Lalo's sense other presence grew clearer.

Then there was a moment's pause; the eyes shone brighter and the tone sharpened.

Her tone sharpened and she looked up, blinking.

The tone had sharpened the least bit.

Her tone sharpened as if she were gathering screams.

But, seeing Fflewddur about to sling the harp on his shoulder once again, her tone changed and sharpened.

Leeds' tone sharpened as they emerged into a mist that had followed the rain.

Then his smile quit working, his tone sharpened, and his eyes had a different look.

'Listen,' Francis's tone sharpened; he'd remembered something he had to say.