Answer:
Whilst I was engaged in sitting. I spied the dead carrying the living
An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes.
You seek it out, when your hunger is ripe. It sits on four legs, and smokes a pipe.
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.
It is worldwide, but once only a spider could weave one
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.