In 2007 Great Britain issued a set of six stamps commemorating the abolition of the slave trade. The design on the 1st value features a portrait of Olaudah Equiano, a Nigerian who was born in 1745 and enslaved in 1756. He purchased his freedom in 1766 and wrote his autobiography, The Interesting Narrative of the Life of Olaudah Equiano, in 1789. The book brought the horrors of slavery to the attention of the British public and ultimately contributed to its abolition.
     The portrait of Equiano on the stamp is the Frontispiece of his book. In 1792 he married an Englishwoman with whom he had two children. He died in 1797. The slave trade was abolished on English ships in 1807.
     The map is of the Atlantic Ocean with the African continent, Equiano's birthplace, North America, and Britain. The map is not identified, but Acadia is identified as Nova Francia, so it may perhaps be dated before 1764 when France ceded almost all of its possessions in the Western Hemisphere.