text: A 2005 biography of this man by Vincent Carretta uses a baptism record and a ship's muster to question traditional accounts of his birth.
full_question: A 2005 biography of this man by Vincent Carretta uses a baptism record and a ship's muster to question traditional accounts of his birth. This man informed Granville Sharp about an incident where slaves had been thrown into the sea to collect insurance proceeds, known as the Zong massacre. Late in life, he became an assistant to a scientist who experimented on the purification of saltwater, Charles Irving, and he married Susanna Cullen. He refused a business offer from Robert King after paying him forty pounds, and joined the London Corresponding Society after moving back to England. Michael Pascal, a lieutenant in the Royal Navy, renamed this man, whose life among the Igbo people and kidnapping with his sister became part of his "Interesting Narrative." For 10 points, name this figure, also known as Gustavus Vassa, who wrote a well-known slave narrative.
first_sentence: A 2005 biography of this man by Vincent Carretta uses a baptism record and a ship's muster to question traditional accounts of his birth.
raw_answer: Olaudah Equiano [or Gustavus Vassa until it is read]