From The Training and Management of Horses by J.P.F. Bell, published 1904. The colt should be in possession of a small head, broad between the eyes, clean, open jaws, and a small, tapering muzzle. His eyes should be full, generous, and prominent, showing plenty of fire when the colt is put upon his mettle. His ears should be small, tapering, and inclining towards each other at the tips when erect. His nostrils should be delicate and curved, with broad, expansive cavities, and when distended they should appear almost transparent at the edges. His neck should be long, lean, and planted on a set of oblique shoulders, with good play. He should have a moderately long, straight back, with strong, well-developed, muscular quarters. He should be deep-chested rather than broad, because if he is very broad in the chest he will never be fast, though he may be able to stay. His fore-legs should be well set on, clean, bony, flat, and free from splints and side-bones, while they should not be too long from the knees to the pasterns. The knees should be flat and fairly large, while the pasterns should be moderately long and elastic, to insure easy springing…