The window close to the pulpit is another example of Perpendicular-style stone tracery, possibly of 15th century origin. The glass is Victorian, designed by Heaton & Butler. The left panel shows Christ as the Good Shepherd, a typical 19th Century illustration of Christ.
The right panel is based on the famous 1854 painting The Light of the World by the Pre-Raphaelite artist William Holman Hunt. Three versions of this painting exist – in Keble College, Oxford, Manchester Art Gallery and St Paul’s Cathedral – and it has been widely copied in stained glass in churches all over the world. This enduring image of Christ is an illustration of the words from Revelation 3:20 – “Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.” Jesus stands in a dark forest holding a lantern and knocking at a door, asking us to let Him into our hearts. It is significant that the door has no handle on the outside. Christ cannot enter unless we admit him.
The window was installed in memory of William Longman who died in 1877; he was a member of the family that founded Longmans publishers,. William authored books on mountaineering, History of the Life and Times of Edward III and A History of the Three Cathedrals dedicated to St. Paul in London. The choice of the Holman Hunt painting was undoubtedly inspired by his love of St Paul’s Cathedral.