Answer:
What can be forever wound up but never annoyed?
I walked and walked and at last I got it. I didn't want it. So I stopped and looked for it. When I found it, I threw it away.
Goes over all the hills and hollows. Bites hard, but never swallows.
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
Bury deep, Pile on stones, My mind will always Dig up them bones
I met a man on the London bridge, he tipped his hat and drew his name, in this riddle I told you his name. What is it?