April 18, 1161: Theobald, Archbishop of Canterbury, dies. He repeatedly quarreled with his superiors about church appointments and other political questions, but he the influential French abbot Bernard of Clairvaux supported him. Theobald helped strengthen the English church and build the career of Thomas Becket, whom he recommended as chancellor to England's newly crowned King Henry.
April 18, 1587: English Protestant historian John Foxe, author of Actes and Monuments of Matters Happenning to the Church (the shorter version is now known as Foxe's Book of Martyrs), dies at age 71 (see issue 72: How We Got Our History).
April 18, 1874: Having died nearly a year earlier (May 1, 1873) in what is now northern Zambia, missionary-explorer David Livingstone (whose remains had been brought, as his tombstone reads, "by faithful hands over land and sea") is interred in London's Westminster Abbey (see issue 56: David Livingstone).
July 14, 1833: Anglican clergyman John Keble preaches his famous sermon on national apostasy, marking the beginning of the Oxford Movement in England. Keble was joined by John Henry Newman and E.B. Pusey, who led this effort to purify and revitalize the Anglican Church by reviving the ideals and practices of the pre-Reformation English church.