Diagram showing the position of the canvas strips

Diagram showing the position of the canvas strips

Raking light photography also revealed the presence of a 'bump' on either side of where the cartoon had been cut into strips. Closer examination confirms that these 'bumps' correspond to strips of canvas applied to the back of the edges of each strip of cartoon. They were probably applied in the 17th century so that the individual cartoon strips could be pinned up together for display and for copying.