In the 1830s, the Reverend John Williams was the most famous missionary of the age in the south pacific.
In 1839 while visiting a part of the New Hebrides, along with fellow missionary James Harris he was killed and eaten by cannibals on the island of Erromango during an attempt to bring them the Gospel. A memorial stone was erected on the island of Rarotonga in 1839 and is still there. Mrs Williams is buried with their son (Samuel Tamatoa Williams, who was born in the New Hebrides) at the old Cedar Circle in London's Abney Park Cemetery; the name of her husband and the record of his death were placed on the most prominent side of the stone monument.
Now a British man who is Williams great-great grandson has taken part in a unique reconciliation event on a south pacific island. Today, 170 years after his murder, the descendants of those responsible felt the need to put old ghosts to rest.
Very odd video of the ceremony at the link.