↑ This form of hatching is part of a scheme of indicating heraldic tinctures developed by Silvester Petra Sancta in his Terrerae Gentilitia (1638), according to Woodcock & Robinson (1988), p. 53.
↑ See the table in Woodcock & Robinson (1988), p. 54, compiled from G. Leigh's Accedence of Armory (1562) and Sir John Ferne's The Glory of Generositie (1586).
↑ Woodcock & Robinson (1988), p. 54, attributed to De Bado Aureo.
Woodcock, Thomas and John Martin Robinson (1988). The Oxford Guide to Heraldry. Oxford: University Press. ISBN 0192116584