A small plaque mounted on the tower pier behind the pulpit makes a mysterious reference to the decoration of the wall. Sophia Jane Hutchinson’s husband mentioned here was in fact James Hutchinson, Rector of St Peter’s 1851-1871. The decoration in question was not the white paint you see today but a huge wall painting, which adorned the whole crossing wall, reviving the medieval tradition of wall decoration in English parish churches. Designed in an Arts & Crafts style, it depicted the Ascension of Christ. Over the years, the condition of the wall plaster deteriorated and eventually the painting was lost. Similar works can still be seen today in the parish churches of neighbouring Little Gaddesden (Burnet), Northchurch and Tring (J Powell & Sons).
Curious carvings have been discovered on this pillar, which appear not to be mason’s marks but musical notes. They are of uncertain origin but may have been etched several hundred years ago by a clergyman to help him to remember an intonation such as a Gloria.