In Alexander’s Garden, a pathway runs, paved with twenty millstones. Each one is a symbol of a bygone century in human history. The Queen calls it the “Alley of the Centuries” and bequeaths that for every new century, a new millstone shall be laid.

At its end, set upon a pedestal, one stone—the witness of our own time—waits for its century to come to an end.

It is time for the next mill wheel.