The Light of the World commemorates not only one of Scotland's greatest explorers but also the friendship between Livingstone and the chemist James "Paraffin" Young, who made West Lothian the capital of Scotland's shale oil industry, and the dedication of Livingstone's companions Susi and Chuma, who carried the explorer's body to the African coast and sent it home without one vital organ. "You can have his body," the accompanying note said, "but his heart belongs to Africa." McVicar tells the story, with accompanying magic lantern slides and songs from folk singer Christine Kydd. The show, whose title comes from an advertising slogan for Addiewell No. 1 Oil, plays St Mungo's Museum, Glasgow on February 28 and a special birthday performance in Livingston's birthplace, Blantyre, on March 19.