John Bigelow (American National Bibliography)
The renewal of the slavery issue in the mid-1850s led Bigelow, [William Cullen] Bryant, and the Evening Post to cast their lot with the new Republican party. In 1856 Bigelow wrote a campaign biography for John C. Frémont, the party's first presidential nominee. As a reward for his constant labors for the Post, Bigelow began an eighteen-month European vacation in 1858 that provided him with contacts among liberal intellectuals and politicians who proved valuable to his later diplomatic career.
Phyllis F. Field, "Bigelow, John," American National Biography Online, February 2000, http://www.anb.org/articles/04/04-00100.html.