A tribute and tree planting for John J. Creighton, researcher, poet, and local historian, was held on Sept. 17 at the Harriet Tubman Memorial Garden in Cambridge. Creighton devoted his life to researching Harriet Tubman and the geographic areas that were associated with her life before the Civil War. His knowledge of the areas and research were the foundation for many of the national, state, and local initiatives related to Harriet Tubman and the Underground Railroad.  He also helped many authors and scholars write books about Harriet Tubman and the Underground Railroad. The Washington Post Magazine recently featured a story about Creighton.