The three main devices (symbols) in the Cantwell blazon are the annulet, canton and leopard’s face. The two main tinctures (colors) are ermine and gules.
Ermine is a very ancient pattern, and distinctive to observe. It was borne alone by John de Monfort, the Earl of Richmond and Duke of Brittany in the late 14th century 1A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P69 It has a long association with royalty and the nobility in general and hence represents “Dignity” wherever it is found 2The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P39. The ermine pattern is white with, typically, a three dots and a dart grouping representing the tail of the furred creature.3Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 28. The ermine spot is sometimes found alone as a special charge on the shield.
Gules, the heraldic colour red is very popular, sometimes said to represent “Military Fortitude and Magnanimity”4The 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 5Understanding 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).6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P154
For easy recognition of the items on a coat of arms, and hence the quick identification of the owner, bold simple shapes are best. Hence, simple geometric shapes are often used for this purpose 7A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P146xz`, and the annulet is a good example, being a circular ring of any colour. They also appear interlaced or one within the other, both of which are very pleasing additions. Wade believes that these were one of the symbols of ancient pilgrims. 8The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P19
“The canton stands very high among honourable bearings”, according to Wade, a noted symbologist 9The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P48. The canton is a square shape, normally occupying the dexter chief of the shield. An early example is SUTTON, Bishop of Lincoln in the 13th century, who bore “argent a canton sable”. It occupies less space than a quarter and hence is sometimes added to an existing shield to difference branches of the same family, or, when a charge is added to it, to indicate some honour has been recieved 10A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Canton. Wade remarks, that, in common with all square features can be associated with the virtue of“constancy”.
The leopard’s face (sometimes, incorrectly referred to as a leopard’s head occurs very frequently in heraldry 11A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Lion. Early heraldic artists tended to treat lions and leopards as the same animal, but during the development of British Heraldry the heads of the two creatures have adopted separate, and more realistic forms. Wade would have us associate leopards with warriors, especially those who overcome ”hazardous things by force and courage” 12The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P65