Statistics for occurrence #1 of “Mr. Frothingham” in page 245 of William Schouler, A history of Massachusetts in the Civil War: Volume 1:

...or Attorney-General, Dwight Foster, of Worcester. Mr. Dickinson had been, in former years, a Whig; in later years, he was what was called a Conservative. He never had joined the Republican party. Mr. Frothingham had always been a Democrat, of the straightest sect; and was, at this time, one of the editors of the Boston Post. Mr. Oliver, Mr. Reed, and Mr. Foster were Republicans, and incumbents of the offices...
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