Every day Hingham residents drive or walk past the entrance to a small park lying between Central and Hersey Streets. Now known as Burns Memorial Park, it was once home to Tranquility Grove, an outdoor space used for meeting and rallies—including in particular abolitionist rallies.

Hingham was home to an active group of abolitionists. Led in large part by local women who were considered extremists by many, Hingham’s abolitionists worked for freedom through petitions, speeches, meetings, and protests. High-profile abolitionists visited Hingham regularly during this period, including Frederick Douglass (who came more than once), William Lloyd Garrison, an aging John Quincy Adams, and the Grimke sisters.

On August 1, 1844, the Hingham Anti-Slavery Society hosted a large regional rally to mark the tenth anniversary of the abolition of slavery in the British West Indies. The rally featured a speech by Frederick Douglass at the First Baptist…