drawingdetail:Edinburgh Lecture Diagram: Decorated Cusped Gothic Window by John Ruskin and Sir John
drawingdetail:Edinburgh Lecture Diagram: Decorated Cusped Gothic Window by John Ruskin and Sir John Everett Millais, assisted by Euphemia Chalmers Ruskin, 1853. Pencil, charcoal, ink, wash, oil and gold paint; paper mounted on linen. Ruskin Foundation, Ruskin Library, University of Lancaster. -- source link