Whenever he met or passed Leo he would mutter something under his breath.
"Leo the Circus Boy"
Ralph Bonehill
For a brief instant the principal's attention was fixed upon the entering girls, and in that instant Mignon found time to mutter in Marjorie's ear, I'll never forgive you for this and you'll be sorry.
"Marjorie Dean High School Freshman"
Pauline Lester
For some minutes she could read no more; the warm tears rolled down her cheeks and dropped heavily on the paper, and she could only mutter to herself, "My poor, dear uncle,-my last, my only friend in the world!"
"The Martins Of Cro' Martin, Vol. II (of II)"
Charles James Lever