[2] The Kings were among the 3,000 black American slaves who were given certificates of freedom, entered into the Book of Negroes, and evacuated with the British; they were resettled in Nova Scotia.
The Black Loyalists especially struggled through the early years of the colony; there were delays in their land grants and supplies, and it turned out that the soil was too poor to support much farming.
[4] Although conditions were improving for them in Nova Scotia, King and his wife decided to immigrate to the new British colony, the Province of Freedom (now Sierra Leone) in 1792.
[4] While studying in Bristol, England, he wrote an autobiography, Memoirs of the Life of Boston King (1798), which was published in four installments in the Wesleyan Methodist Magazine in London.
It was one of the genre of African American slave narratives, notable as one of three by Black Nova Scotians and one that spanned the Atlantic, as he wrote about his emigration to Sierra Leone.