Overview
Mary Black was a slave of African descent in the household of Nathaniel Putnam of the Putnam family who was accused of witchcraft during the Salem witch trials. Nathaniel's nephew was Thomas Putnam, one of the primary accusers, though Nathaniel himself was skeptical and even defended Rebecca Nurse. Mary was arrested, indicted, and imprisoned, but did not go to trial, and was released by proclamation on . She returned to Nathaniel's household after she was released, another indication of Nathaniel's view of the charges against her.
Along with Tituba and Candy, Mary was one of three slaves accused during the hysteria. All of them survived.
Arrest
John Hathorne and Jonathan Corwin ordered Mary Black, along with Sarah Wildes, Sarah and Edward Bishop, William and Deliverance Hobbs, Nehemiah Abbot, Mary Eastey, and Mary English to be arrested on April 21, 1692, on "high suspicion" of witchcraft performed on Ann Putnam, Jr., Mercy Lewis, Mary Walcott, and others, due to a complaint by Thomas Putnam and John Buxton.
From Wikipedia (CC BY-SA 4.0).