This same ship had reportedly carried as many as 609 slaves and was 267 tons burden, making 2.3 slaves per ton. The views of Club speakers are their own and their participation does not constitute or imply endorsement or recommendation by The Commonwealth Club. A plan of the British slave ship Brookes, showing how 454 slaves were accommodated on board after the Slave Trade Act 1788. Slave ships usually took between six and eleven weeks to complete the voyage. From the British Library: 'This diagram of the 'Brookes' slave ship, which transported enslaved Africans to the Caribbean, is probably the most widely copied and powerful image used by those who campaigned to end the trans-Atlantic slave trade. Each year, we bring nearly 500 events on topics ranging across politics, culture, society and the economy to our members and the public, both in-person and via extensive online and on-air listenership and viewership. The voyage from Africa to the New World of the Americas was called the Middle Passage. The Commonwealth Club of California is the nation's oldest and largest public affairs forum. The leading national forum open to all for the impartial discussion of public issues important to the membership, community and nation.