"I'm sorry, " I mumbled to the tight wool weave of the cushion's covering.

NPR: Excerpt: 'Atmospheric Disturbances'

"It was just a thought, " I mumbled.

CNN: AllPolitics - TIME This Week

A., I mumbled to myself.

WSJ: Book Excerpt: Confessions of a Surgeon

Taken aback, I had mumbled that it could be three million or so.

BBC: India

He mumbled in his slumber, Yeah, I'll go along with Case.

NPR: Baseball, Apple Pie and Steroids