The Stone House is where Prentice was being nursed back to good health when they didn't know why he sank in shadowvapor. Wylie was also here for a time (after he escaped his kidnapping), though he was later moved to Alluveterre. After Calla finds out the Sior, Lur, and Mitya are quarantined, she brought Sophie, Keefe, Biana, and Dex here. Once there, Sophie saw Blur, Magnate Leto, Tiergan, and Wylie all there.