The four main devices (symbols) in the Hopwood blazon are the barry, escallop, paly and millrind. The two main tinctures (colors) are vert and argent.
The deep green colour that is so often observed in heraldry is more properly known as vert. According to Wade, the use of this colour signifies “Hope and Joy”, but may also represent, rather delightfully, “Loyalty in Love” 1The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36. It has other names also, the French call it sinople, perhaps after a town in Asia Minor from where the best green die materials could be found 2A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Vert. More fanciful heralds liked to associate it with the planet venus and the precious stone emerald 3Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 27. More strangely, there is some evidence that the term prasin was anciently used, being the Greek for the vegetable we call the Leek!
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.
When the field of the shield is filled with alternately coloured horizontal lines, this is known as barry, obviously because it is like having many separate bars across the field 6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Barry. Such shields have great clarity from a distance, those awarded by Henry III of England to Richard de Grey were, for example, Barry argent and azure, simple blue and white horizontal stripes. According to Wade, there was no specific meaning to be attached to barry itself, but it affords the opportunity to display at equal importance two colours that may themselves have specific meanings 7The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P55.
The escallopoccurs often in arms, represented as the outside of the shell, sometimes “fluted” of a different colour 8A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Escallop. It has been part of heraldic tradition almost from the beginning of the art, Henry III of England awarded Gules, 3 escallopes argent to Herbert de CHAMBERLEYNE in the 13th century, and it is present in the heraldry of almost all countries 9A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P299. It is believed that they were adopted as badges of those going to the Holy Land and can be found in the arms of many a crusading family. Hence Wade’s suggested association of the scallop with those that “complete long journeys to far countries” 10The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P91.
Play is what is known as a treatment, a regular patterning, usually over the whole background of the shield. The word comes from the pale, the major vertical stripe that appears on some shields, paly is obvious its little cousin, consisting of, typically, 6 or more vertical stripes, alternately coloured 11A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Paly. The stripes can be any combination of the heraldic tinctures, an early example is that of GURNEY, being simply paly of six, or and argent. Paly can be combined with other effects, such as decorative edges on each stripe, or overlaid with other treatments such as bendy, and these can be very effective and pleasing to the eye 12A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P121.