The main device (symbol) in the Greinvile blazon is the clarion. The two main tinctures (colors) are gules and or.
Gules, the heraldic colour red is very popular, sometimes said to represent “Military Fortitude and Magnanimity”1The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36. It is usually abbreviated as gu and in the days before colour printing was shown in a system known as hatching by vertical lines 2Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P52. Although it may look like a French word it is normally pronounced with a hard “g” and may be derived either from the Latin gula (throat) or Arabic gule (rose).3A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P154
The bright yellow colour frequently found in coats of arms is known to heralds as Or, or sometimes simply as Gold.4Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 27. Along with, argent, or silver it forms the two “metals” of heraldry – one of the guidelines of heraldic design is that silver objects should not be placed upon gold fields and vice versa 5A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P85. The yellow colour is often associated with the Sun, and the zodiacal sign of Leo.6Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53.
Music was as popular in the middle ages as it is today and musical instruments are frequently to be found in coats of arms 7A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P292. Sometimes these are a “play on words” such as the trumpets appearing for Trumpington 8Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 100, but sometimes just for the pleasure and ease of identification that these objects allow. The clarion is an example of this. In common with most instruments, Wade believes that the symbology of these devices is “ready for the fray”. 9The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P109