The plain, simple names of colours, such as red and green, seemed so unpoetical and unostentatious to the heralds and poets of the Middle Ages, that they substituted for gold, topaz; for silver, pearl or "meergries"; for red, ruby; for blue, sapphire; for green, emerald; and for black, diamond or "zobel" (sable, the animal, whence the word "sable"). Let the following blazonment from the grant of arms to Mödling bei Wien in 1458 serve as example of the same: "Mit namen ain Schilt gleich getailt in fasse, des ober und maister tail von Rubin auch mit ainer fasse von Berlein, der under thail von grunt des Schilts von Schmaragaden, darinneain Pantel von Silber in Rampannt"--(_lit._ "Namely, a shield equally divided in fess, the upper and greater part of ruby, also with a fess of pearl, the under part of the field of the shield of emerald, therein a panther of silver, rampant"); that is, "Per fess gules and vert, in chief a fess argent, in base a panther rampant of the last." Even the planets, and, as abbreviations, their astronomical signs, are occasionally employed: thus, the _sun_ for gold, the _moon_ for silver, _Mars_ for red, _Jupiter_ for blue, _Venus_ for green, _Saturn_ for black, and _Mercury_ for purple. This aberration of intellect on the part of mediæval heraldic writers, for it really amounted to little more, had very little, if indeed it had any, English official recognition. No one dreams of using such blazon at the present time, and it might have been entirely disregarded were it not that Guillim sanctions its use; and he being the high priest of English armory to so many, his example has given the system a certain currency. I am not myself aware of any instance of the use of these terms in an English patent of arms.