Solomon Northup's life after the publication of his book 'Twelve Years a Slave' remains largely unknown, with earlier accounts suggesting his death and family relocation to Oswego; however, further research indicates they moved to Moreau, New York. Northup actively participated in anti-slavery meetings and gave numerous lectures about his experiences from 1853 to 1857. Additionally, he engaged in efforts to assist fugitive slaves through the Underground Railroad, contributing to historical accounts of his post-slavery activities.