Bab 36: XXXVI. The Litmus Revolver.

"Vanilla! They are too many!" Rowie shook like a motor on Vanilla's back.

She tried to look and find a quick escape, but the cobblestone walls of two meters would make it impossible to jump out to and run away, and it was a clear suicide to try to run to the gate that led outside.

The zombies tottered, crawled, and wobbled from their tombstones against her, passing between broken concrete, creepers, and occasionally tripping over from the irregular elevations of the terrain.

But even if she wanted to run away for her own safety, Vanilla wasn't there to flee away. She was there to gather an item, and someone or something just got inside the mausoleum.

Considering what the diary of Albert Greymann put, only he and possibly his son knew about the secret entrance at the mausoleum.