Answer:
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help. Yet many people are afraid to let me help them.
My sides are firmly laced about, Yet nothing is withinอพ You'll think my head is strange indeed, Being nothing else but skin.
If you spot one of these eastern warriors, they're not doing their job right.
I have three hundred cattle, with a single nose cord
Who works when he plays and plays when he works?
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?