Reverend Parris 's slave , Tituba , is from Barbados . Abigail says that she put a spell on Betty so she would not wake up . Conversations between Parris , his niece Abigail Williams and between several girls reveal that they , including Abigail and Betty , were engaged in occultist activities in a nearby forest , apparently led by Tituba , Parris 's slave from Barbados .