The main device (symbol) in the Eastcott blazon is the escallop. The two main tinctures (colors) are sable and argent.
Sable, the deep black so often found in Heraldry is believed to named from an animal of the marten family know in the middle ages as a Sabellinœ and noted for its very black fur 1A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Sable. In engravings, when colors cannot be shown it is represented as closely spaced horizontal and vertical lines, and appropriately is thus the darkest form of hatching, as this method is known 2Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 26. Although it may seem a sombre tone, and does indeed sometimes denote grief, it is more commonly said to represent Constancy 3The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P35.
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 escallopoccurs often in arms, represented as the outside of the shell, sometimes “fluted” of a different colour 6A 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 7A 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” 8The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P91.