Most famous for his autobiographical Interesting Narrative, FTP, identify this former slave turned abolitionist alternately named Gustavus Vassa.
His only written work recounts his experience with a black cook forced to wear an iron muzzle and unable to eat or speak.  Early in his life, he was captured by Aro tribesmen and eventually sold to Michael Henry Pascal, who gave him his alternate name.  He was taught English by Richard Baker, under whom he gained considerable sailing knowledge, which he used to purchase his freedom, accruing forty pounds sterling in four years.  Most famous for his autobiographical Interesting Narrative, FTP, identify this former slave turned abolitionist alternately named Gustavus Vassa.
His only written work recounts his experience with a black cook forced to wear an iron muzzle and unable to eat or speak.  
Olaudah {Equiano} (accept early Gustavus {Vassa})