This designs of two angels was probably made in 1864 specifically for the west window of St Oswald’s, Durham (a three-light window with tracery) in which the main lights showing six scenes from the life of St Oswald were designed by Ford Madox Brown. The quarry panels below have shields bearing the arms of Elliott, Fogg and Fogg-Elliott by Philip Webb, while Morris was responsible for designing the half-length angels in circlets set in quarry panels between the upper and lower scenes in the main lights and for the angels in the tracery above. The angels, for which A21 is the design, appear in the second tier of tracery in two panel lights.
The same cartoon was used for windows in: Bradford Cathedral, 1864, Bloxham, 1869, Christ Church, Oxford, 1871, Knaresborough, 1873, Over Stowey, 1873, West Wratting, 1910, Wirksworth, 1909, and Wormington, 1912.