Answer:
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
Five hundred begins it, five hundred ends it. Five in the middle is seen. First of all figures, the first of all letters. Take up their stations between. Join all together, and then you will bring before you the name of an eminent king.
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
A house full, a yard full, a chimney full, no one can get a spoonful.
A box without hinges, lock or key, yet golden treasure lies within.
What did the piece of wood say when he saw the screwdriver and screws approaching?