Statistics for occurrence #1 of “Mr. Sumner” in chapter 17 of Elias Nason, The Life and Times of Charles Sumner: His Boyhood, Education and Public Career.:
...fending Baez; and he insinuated, in conclusion, that Mr. Sumner, Judaslike, was trying to stab the Republican party in the back.
Replying to Mr. Howe, Carl Schurz in a very brilliant speech said, Mr. Sumner had plunged his dagger not into the Republican party, but into Caesarism; and we cannot forget that the world has agreed to pronounce Brutus the noblest Roman of them all.
...