Answer:
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
I have a gown but I'm not a priest; I have a crown but I'm not a king.
I begin and have no end. Eventually I will be the end of all that has begun.
As I went over London Bridge I met my sister Jenny; I broke her neck and drank her blood and left her standing empty.
My days are numbered. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.