Answer:
I had a bright start, but I couldn't take the pressure. I consume everything, yet I don't eat anything. What am I?
Marking mortal privation when firmly in place. An enduring summation inscribed in my face.
In wealth I abound; in water I stand; as a fencer I'm valued all over the land; at Venice I'm famous; by farmers I'm prized; respected by law yet huntsmen despised; consternation and ruin ensue when I break; And the beasts of the forest advantage won't take.
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
I sit in a corner while travelling around the world.
A cowboy rode into Friday. He stayed in town for three days and rode back on friday. How is that possible?