The two main devices (symbols) in the Middlemore blazon are the moorcock and chevron. The two main tinctures (colors) are argent and sable.
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) 1. In a sketch or drawing it is represented by plain, unmarked paper 2.
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 3. 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 4. Although it may seem a sombre tone, and does indeed sometimes denote grief, it is more commonly said to represent Constancy 5.
The Moor cock occurs in a number of coats of arms but always seems to be reference to the family name (e.g. MOORE) rather than having any special significance as a type of bird. 6
The chevron is one the major shapes used upon a shield, known as ordinaries. The inverted ‘V’ of the chevron is perhaps thought to have originated to represent a military scarf folded on the shield 7, or additional cross-pieces used to strengthen the shield and painted a different colour.8. It has also acquired the meaning of “Protection… granted… to one who has achieved some notable enterprise” 9, possibly becuase of its resemblance to the roof truss of a house.