Two treatises on colouring: (pp. 1-8) 'Theory of colouring' by William Mason; (pp. 11-21) 'Directions by Mr. Rathbone'; (p. 23) water-colour drawings, 18th century. A note inside the upper cover, by George Harcourt, 2nd Earl Harcourt, certifies that the first treatise is in Mason's hand.