1. Jacob de Gheyn, The Exercise of Armes for Calivres, Muskettes, and Pikes (The Hague, 1607).
2. Dutch Tiles in the Philadelphia Museum of Art, with essays by Jan Daniël van Dam and Pieter Jan Tichelaar; catalogue by Ella Schaap et al. (Philadelphia: Philadelphia Museum of Art, 1984), p. 22.
3. This is where the second firing, which fuses glaze with the pigments, takes place.
4. Jan Pluis, De Nederlandse Tegel: Decors en Benamingen, 1570–1930 (The Dutch Tile: Designs and Names, 1570–1930), exh. cat. (Leiden: Nederlands Tegelmuseum, 1997), p. 77.
5. Ibid., p. 41.
6. Dingeman Korf, Dutch Tiles (New York: Universe Books, 1964), pp. 16–17.