The two main devices (symbols) in the Bardesey blazon are the maunch and bar. The two main tinctures (colors) are argent and gules.
Argent is the heraldic metal Silver and is usually shown as very pure white. It is also known more poetically as pearl, moon (or luna) 1Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 2A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
The bold red colour on a heraldic shield is known as gules. It has a long history within heraldry, it is known that one of those who besieged the scottish castle of Carlaverock in 1300 was the French knight Euremions de la Brette who had as his arms a simple red shield.3The Siege of Carlaverock, N. Harris, Nichols & Son, London, 1828, P180. The word gules is thought to come from the Arabic gule, or “red rose” 4Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 313. Later writers associated it with the precious stone ruby and the metal iron 5Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53, perhaps because of the red glow of iron in the heat of the blacksmith’s forge.
When people are depicted in heraldry their clothing and appearance are often described in some detail 6Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P174. We also find individual items of clothing used as charges in a coat of arms, and maunch is a good example of this, representing a loose sleeve. Sometimes these items are drawn in a somewhat stylised fashion, not always obvious as to what it represents. 7A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Maunch Wade suggests that its use came from a role in the tournament in which a part of clothing or some other trinked was given as a token to knights in combat by their supporters. 8The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P50
The bar is a thin, horizontal stripe across the centre of the shield 9A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Bar, usually in groups of two or three (any more and there would be confusion with barry, a treatment of horizontal lines of alternating colours). Bars can be a distinctive and easily recognised device, early examples include those awarded by Henry III of England to the family MAUDYT Argent, two bars gules.