EntityQ6255335· pop 6· linked from 83 articlesJohn RockSign in to saveAmerican abolitionistListeners · Last.fmListeners291Total plays1,491 <a href="https://www.last.fm/music/john+rock">Read more on Last.fm</a>via Last.fm · john rockConnectionsBostonEntityFugitive Slave Act of 1850EntityCategories1825 births1866 deaths19th-century African-American lawyers19th-century African-American medical doctors19th-century American dentists19th-century American lawyers19th-century American medical doctors19th-century deaths from tuberculosisAbolitionists from BostonAfrican-American abolitionistsAfrican-American people with free status before 1865