Kerri Greenidge, a professor at Tufts University, will give a talk entitled "Go Forth and Enlighten Your Brethren! Black New England, William Lloyd Garrison, and the Legacy of Radical Abolition" in this, the fourth annual lecture sponsored by the Friends of William Lloyd Garrison. The annual lecture marks the birthday of the abolitionist and newspaper editor who was born in Newburyport. The lecture is free and open to the public.