[She thinks for a moment before answering.]

No, I haven't. Does that realm belong to some Daedric Demiprince?

[Most of the alternate planes Thiirien's aware of are ruled over by the Daedra--godlike entities. Though Primal Earth definitely isn't one of the major realms of Oblivion that the well-known Daedric Princes claim, so she's stumped.]