Compare a set of writing utensils in the National Palace Museum, illustrated in Emperor Ch'ien-lung's Grand Cultural Enterprise, National Palace Museum, Taipei, 2001, nos. I-28, I-29, I-30 and I-31, comprised of a water holder and spoon, a brushrest, an inkstone warming box and a paperweight. For archaistic dragons similar to those on the sides of the inkwell, see a small cloisonné enamel vase in the Clague Collection, published in "Chinese Cloisonné: The Robert and Marian Clague Collection", Arts of Asia, 1975, vol. 5, no. 1, p. 25.