Feeding the ghosts

"The sea is slavery," begins Fred D'Aguiar's powerful novel, which starts aboard the Zong, a slave ship returning from Africa in 1781. Only ten weeks into the voyage, the Zong is struck with a disease that threatens to infect all of the human cargo. The ship's profit-driven commander, Captain Cunningham, conceives a gruesome plan to safeguard his financial investment. In order to recover insurance money and protect the rest of the valuable stock, the captain orders his men to bring the sick and infirm slaves on deck in small numbers and throw them over the side. During the roundup, Mintah, a…