Death was ever present, because the Numenoreans still, as they had in their old kingdom, and so lost it, hungered after endless life unchanging.
There are no more uses of "Old Kingdom" in the book.
Show samples from other sources
It ensured that every day was different, and had, in the weeks she’d been transparent, exposed Mae to virtually every corner of the campus—from the Age of Sail to the Old Kingdom, where they were, on a lark more than anything, working on a project to attach a camera to every remaining polar bear.
Dave Eggers -- The Circle
They say it’s called Lydian after the old kingdom of Lydia, but actually, I named it for an old girlfriend of mine, Lydia.