The Carl Laszlo collection, Basle
Fiona MacCarthy, The Last of the Pre-Raphaelites: Burne-Jones and the Victorian Imagination, Faber & Faber, London 2012, page 325:
The Wyndhams had been at the forefront of the founding of the Royal School of Needlework in London, for which Burne-Jones supplied designs. Two of these, Poesis and Musica, were originally intended as portières worked by the students in brown crewel on linen. The Wyndhams acquired the cartoons for both these designs, which Burne-Jones then worked up in colour.