“She is the one who sleeps. She is the one who listens and dreams of her return,” Clifford intoned.
I notice a couple of possible references here, though it might just be a coincidence.
Firstly we have a character called "Lazarus Long". Which is also the name of the protagonist of one of my favorite novels: "Time Enough for Love", by Robert Heinlein.
The other is a bit more far fetched, but the line: "For untold eons, though she slumbers, she has kept it safe [... ]She is the one who sleeps. She is the one who listens and dreams of her return", feels somewhat reminiscent of Lovecraft: "That is not dead which can eternal lie, and with strange aeons even death may die." and "In his house at R'lyeh, dead Cthulhu waits dreaming".