OF LIGHTING THE LOWER PARTS OF BODIES CLOSE TOGETHER, AS OF MEN IN
BATTLE.

As to men and horses represented in battle, their different parts
will be dark in proportion as they are nearer to the ground on which
they stand. And this is proved by the sides of wells which grow
darker in proportion to their depth, the reason of which is that the
deepest part of the well sees and receives a smaller amount of the
luminous atmosphere than any other part.

And the pavement, if it be of the same colour as the legs of these
said men and horses, will always be more lighted and at a more
direct angle than the said legs &c.