Answer:
When I get closer my tail grows longer, but when I go away my tail leads the way.
What can go through glass without breaking it?
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. I have greatest power when given away, yet lust for me keeps me locked away.
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
I am black within and red without; with four corners round about. What am I?