According to Obadiah Blackhall, the mansion has been in his family for generations, dating back to long before the Great War, and is a "fine example of Victorian architecture." He intends to keep this tradition alive, staying in the estate until he dies or the swampfolk get him.
The mansion opens up into a main room with a kitchen on the left and a library on the right where Obadiah sits. In the library is a staircase that ascends to the second floor which has some bedrooms, one with an Average locked safe. After entering the library, on the left is a hallway that leads to a basement where Obadiah performs ritual acts.
- The door to the basement does not appear unless the Lone Wanderer gives the Krivbeknih to Obadiah, and remains invisible on the map.
- Outside Blackhall are many dolls which signal swampfolk territory, although the only one in the house is already dead.
- This house may also be used as a place to live since all beds are able to be slept in and the player character can safely store things in the house's containers.
- The front door to Blackhall Manor is, from the outside, a set of double doors. However when inside the manor, it is just a single door leading back outside.
- In the kitchen, there appears to be a faucet on the counter, yet there is no sink.
- Blackhall Manor was called Whitehill at a stage of its development, based on the name of its .nif file.
- Just south of the manor toward Dove Delta, there is an obelisk with a readable inscription marking the day that "Captain John Smith landed in the New World."
- Opening and looting containers (like safes) will not make Obadiah Blackhall hostile.