Diagram Of The Shield Of The Trinity, In A Compilation Of John Of Wallingford's Works

This volume contains a chronicle, and several works composed by John of Wallingford, written in his own handwriting. He became a monk of Wallingford (between Oxford and Reading) in 1231, moved to St. Albans in 1246/7 where he was in charge of the infirmary, and moved again c.1257 to Wymondham, a cell of St. Albans, where he died in 1258.
Parts of the manuscript were written and illustrated while he was at St. Albans, but other parts date to the final year of his life, when he was at Wymondham, a few miles south-west of Norwich. This drawing shows a shield, marked in the roundels with the names of the Trinity: 'Father', 'Holy Spirit' and 'God' (the lowermost one is damaged, but would have read 'Son'). Two demons are shooting arrows at the superimposed image of the Crucifixion, but the arrows are falling to the ground at their feet, broken.