original_query: What was Josiah Forster's role in the British and Foreign Anti-Slavery Society?
query: What was Josiah Forster's role in the British and Foreign Anti-Slavery Society?
answer: Josiah Forster was an early member of the British and Foreign Anti-Slavery Society, formed in 1839.  A picture was commissioned showing him as a delegate at an important convention of the society in 1840.