The two main devices (symbols) in the Glassford blazon are the spur rowel and bend engrailed. The two main tinctures (colors) are gules and argent.
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.1The Siege of Carlaverock, N. Harris, Nichols & Son, London, 1828, P180. The word gules is thought to come from the Arabic gule, or “red rose” 2Boutell’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 3Understanding 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.
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) 4Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 5A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
The word spur as a noun indicates a spike on the back of horseman’s boot to goad a horse into action, and for the same reason as a verb it signifies “encouraging action”. Because of this, Guillim assigns the meaning “press onward” to the prescence of a spur in a coat of arms. 6A Display of Heraldry, J. Guillim, Blome, London, 1679, P256 It can be depicted either as the full item, with connections to the boot, or just as the star-shaped spur rowel which contains the spikes. 7A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Spur
The bend is a distinctive part of the shield, frequently occuring and clearly visible from a distance – it is a broad band running from top left to bottom right 8Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 39-40. It can be further distinguished by embellishing the edges. The pattern engrailed is a series of scalloped indentations with the points facing outwards – and should not be confused with invected, which has the points facing inwards! Wade believes that both of these indented forms represent “earth or land”, and one perhaps can indeed see the furrowed earth embodied in them.