Clive Staples Lewis, the notable Christian writer, was baptized in the font at the west end of the church on January 29th 1899 by his grandfather, the Rev. Thomas Hamilton, Rector of St. Mark's.
Looking from the baptistry towards the Communion table at the east end of the church, one can see how the architect, William Butterfield, has designed it so that the table, from which worshippers receive the bread and wine of Communion, is the most important object in the church, standing higher (and therefore more important) than the pulpit from where the preacher preaches, or the lectern from which the Bible is read.