Page 20 in RORL #2 got me thinking about some other potential hooks or adventures to through at a party. Specifically, Grubber's Hermitage made me immediately think of Innsmouth. I'm thinking of a side trek involving a missing fishing boat, Lacedons and small cult of Urgathoa that borrows heavily from the Lovecraft's Dagon (and perhaps some material from Dragon 349).
I'm also thinking that if I throw in that side trek, I would replace the encounter in B36 with an undead, giant octopus, as an ancient servitor of Urgathoa.
Spoiler:
Given the prehistory of Foxglove Manor, as described in areas B30 - B37. I think it would fit in fairly well. Granted, that encounter would be a bit beyond what is already in place. All of this is entirely due to how I perceive the Manor. In my mind's eye, I see a striking resemblance to Cavendish Hall, from Hellboy: Seed of Destruction.