Goodnow had been a committed abolitionist since at least 1840. After hearing a speech given by New England Emigrant Aid Company founder
Eli Thayer in December 1854 about the need to
fight against the proslavery influence in Kansas Territory, Goodnow decided that he would emigrate to Kansas Territory with the Company the following spring. Thereafter, he also began writing editorials and letters encouraging others to join the cause. On March 6, 1855, Goodnow departed
Boston,
Massachusetts, with a group of New England emigrants that would ultimately number 75. On March 18, Goodnow's party reached
Kansas City, where Goodnow met with the Company's representative
Samuel C. Pomeroy and decided to form the Company's new settlement at the junction of the
Kansas River and the
Big Blue River. Goodnow and six other men traveled into Kansas Territory as an advance guard to establish the location. When Goodnow's team arrived, two other small settlements had already been established at the chosen location, named Polistra and Canton. In April 1855, Goodnow and the other pioneers combined the settlements into a new town named Boston. Goodnow helped to draft the
constitution for the Boston Town Company. Two months later, in June 1855, the
steamboat Hartford, carrying 75 settlers from
Ohio, ran aground in the
Kansas River near the settlement. The
Hartford passengers accepted an invitation to join the new town, but insisted that it be renamed
Manhattan, which was done on June 29, 1855. Goodnow established a claim just outside Manhattan, and was joined by his wife in July 1855. Other settlers arriving in Manhattan that year included his brother, William Goodnow; his sister, Lucinda Parkerson; and his brother-in-law,
Joseph Denison. == Bleeding Kansas ==