Quaker persecution continued in many forms, and the Southwicks that were so supportive of Holder were imprisoned and eventually driven out of the Massachusetts colony. That was not enough for Governor Endicott, however. Lawrence and Cassandra Southwick had a son named Daniel and a daughter named Provided, and Endicott attempted to have these two children put into slavery. No ship master or other person in the colony would be a party to this atrocity, however. The noted Quaker poet, John Greenleaf Whittier wrote the poem "The Ballad of Cassandra Southwick" about this incident, but the poem was actually about the daughter, Provided, rather than the mother, Cassandra.