Horsefaq.org
A Handbook for Horse Owners
(4) 'Bishoping' is another trick of'copers'.
The teeth are filed short and level and a false mark is gouged out of the centre of the tooth and blackened with caustic. To detect this trick:
Horses are measured by 'hands'. A 'hand' is 4 inches, so that 15 hands = 5 ft. The height is taken from the highest point on the withers. A pony usually signifies a horse under 14 hands (except for polo ponies). Cobs and Galloways are under 15 hands.
As a horse's markings are nearly always white, it is unnecessary to use the word 'white' in describing them: 'stocking off hind' or 'sock near fore' is sufficient. Most horses have some white on their faces the 'star' being the most common. It is useful to know that whenever a horse gets a sore, the hair on that spot often turns white. Many descriptions therefore represent past rubs - such phrases as, for example, 'trace marks', 'collar marks', 'saddle marks', 'girth marks' often form part of the description of a horse.
The head should not be large in proportion to the horse's size. There should be a general appearance of leanness, and of width between the eyes, depth through the jaw, and fineness about the muzzle. The lips should close firmly over the teeth. The nostrils should be fine and well open. The eyes should be well set, large and soft, the eye-wall neither prominent nor deeply set. The two depressions which a horse sometimes has over the eyes are inherent, and have nothing to do with age. The neck should be long and lightly shaped but muscular. Seen from above it should be thick and firm to the touch. The lower part, where the wind pipe is, should be loose and flexible. The mane and tail should be composed of perfectly straight hair.