(Chapters 20-31) What are the details and atmosphere of Wemmick's home?

From the text:

I highly commended it, I think it was the smallest house I ever saw; with the queerest gothic windows (by far the greater part of them sham), and a gothic door almost too small to get in at.

The bridge was a plank, and it crossed a chasm about four feet wide and two deep. But it was very pleasant to see the pride with which he hoisted it up and made it fast; smiling as he did so, with a relish and not merely mechanically.

The piece of ordnance referred to, was mounted in a separate fortress, constructed of lattice-work. It was protected from the weather by an ingenious little tarpaulin contrivance in the nature of an umbrella.

I expressed the readiness I felt, and we went into the castle.