|                                          In the 17th century, slavery was common,               legal, and vital to the colonial Massachusetts economy. As the late               legal historian, Judge A. Leon Higginbotham, Jr. observed, Merchants               from Massachusetts, the most vigorous slave traders in the world,               made enormous profits from the slave trade.             In 1638, the first African slaves arrived               at Boston in the Massachusetts Bay Colony. Few English settlers               thought to question the ancient institution of slaveryalthough               it never existed in Englandand most whites condoned the profitable               international black slave trade.                            Despite losing their freedom and personal               autonomy, however, Massachusetts slaves retained access to the courts.               Unlike slaves elsewhere in the colonies, they could give legal testimony               under oath and bring civil actions to obtain their freedom.                                                                        |                                        |                                    Samuel Sewall (16521730), a judge in the Salem witch trials,                   later publicly repented his role in those heinous proceedings.                   In 1700, he wrote The Selling of Joseph, the earliest                   known antislavery tract.                    Oil Portrait by John Smibert, Courtesy                   of the Peabody Essex Museum |                                                      |             |                                                                                    Insurrection on Board a Slave Ship,               From William Fox, Brief History of the Wesleyan Missions,               1851                                                                 read               an excerpt             The Selling of Joseph, 1700               Courtesy Massachusetts Historical Society                                         |