The anachronism... it burns. This location reads/is mapped like a mansion out of Jane Austen, not something for the LotFP timeframe, let alone something that'd work with any sort of typical OSR renaissance/medieval/ancient fantasy.
On a more minor note, the spatial relation of the eight levels and dozenish outdoor features is left to be inferred from the details of the keys, which end up unclear. It could have used a half page or so describing the overall arrangement of the spaces, which would be a reasonable replacement for the wasted "blank page to track monster hit points". The second-lowest level has a layout that reads like a d&d convention, rather than having any clear relation to the narrative reason for the existence of that level. There's also a completely unexplained mystery in the second-to-last location (#50); there's no motivation, no viable cause within the bounds of the module for why that event happened 10 years ago or presents itself to modern explorers in the way it does. This reeks of authorial laziness.
[2 of 5 Stars!]