The party leaves the library and ascends the spiral staircase to the third floor. The dented remains of the wolf knight lay strewn about the hall. Past the secret door Taniwha found in the western wall is a narrow, 5' wide staircase, which the party uses to climb up to the attic.
The attic is dominated by a large hall that is 20' wide at its widest point. There are two doors in this room, and a hallway branches north two two more. To the south is a window so slick with grime that it's almost opaque. Yet, the party can see the mist-shrouded lawn outside—and still nothing beyond. The wall of mist still hangs around the house.
Using Vasha's directions, the party can easily find the storage room. The 20' wide space is cluttered with dusty chairs, coat racks, and standing mirrors and draped with white sheets. On the north wall is an iron stove, and in the west wall is an alcove with another grimy window.

Vasha
The party has to stand in place for a minute until Vasha appears, once again a gaunt, spectral form of pale blue light.
"I trust you are here because you found the spells? I fear you will need all the help you can get down there." She presses a ghostly hand to the northeast corner of the room.
"Here you will find the secret passage. Would that I could go with you, but my curse prevents me. Please do what you can for the children."
With Vasha's guidance, any of you can easily make out the hair-thin seam of the secret door. It swings wide almost too easily, as if the house
wants you to go downstairs. You find a creaky, rotting wood staircase spiraling down and down through a cramped, 5' stone shaft.
"I will pray for your safe return. Morninglord be with you." Vasha bows and is gone again.
OOC:
Feel free to explore the rest of the attic or house if you wish. Once the party is ready to go down, give me the party's single- and double-file marching orders. Since we are in PbP, you may feel it helpful to establish default behaviors (e.g. "we want to trend southward" or "I'm always looking for traps").