[39] Citations are taken from the edition by Hardie, Edward Norgate and the Art of Limning, with corresponding page numbers, here page 93. See also Muller & Murrell, Edward Norgate: Miniatura,  59. This latter edition is based on the manuscript in the collection of the Royal Society, London: MS 136 with additional annotations from other manuscripts. Spring et al., “Black Earths,” 99 and note 27, found several types of black coal pigments in Italian paintings. De Mayerne (Sloane MS 2052, fols. 4r, 122v, and 156v) mentions a black coal and a black coal from Scotland (le charbon de terre d’Escosse).