Fixed Interval

When he turns fifteen, you'll be fifty-four.
When he turns thirty, you'll be sixty-nine.
This plain arithmetic amazes more
than miracle, the constant difference more
than mere recursion of father in son.
If you reach eighty, he'll be forty-one!

The same sun wheels around again, the dawn
drawn out and hammered thin as a copper sheet.
When he turns sixty you'll be gone.
Compacted mud, annealed by summer heat,
two ruts incise this ghost-forsaken plain
and keep their track width, never to part or meet.