The term 'cartoon', as used here, means a full-sized drawing for execution in another medium, in this case stained glass. The figures were traced from a drawing made by Rossetti, for which he used his family and friends as models: William Morris posed for St Peter and Jane Morris for the Virgin Mary. It was Morris, however, who divided the design up into workable units of glass by adding the leading lines to the tracing. An indication is provided also of the colour of glass to be used for each unit. The window was made in the Morris, Marshall, Faulkner and Company's glass workshop in Red Lion Square, London, for the church of All Saints in Selsey, Gloucestershire.