Lament never actually says the Mare's full name. He does refer to her as "Bell," so she can surmise that is at least part of her name, but likely not her full name. Bell's father is referred to as "Mr. Mordant," at points.
Posey explores the house to find that:
The large library-parlor room occupies a portion of the southeast of the house, with a billard room next to it, which includes a pair of tables with other games. Lament has more than one chest set, including a griffin knight themed set, as well as a drawer displaying what seems to be collectable playing cards. On the other side from the library parlor room is another room likely best described as a parlor room (smaller than the last), with a couple couches and a large potted plant. This room holds a display with a number of weapons (a halberd, assorted pole arms, swords, an entire suit of armor, arquibuses and a musket). Beyond this in the corner is a library, which seems to be more the "real" library than the last. This room is two floors with a spiral staircase going up, a small desk, and while there are several windows, there are book shelves going all the way to the top of the second floor, with a small ladder to reach them. These books look a bit older. Adjacent to this room, though not connected, is a large kitchen, as well as a pantry, a large butler's pantry, and in the northwest corner connected to the entry foyer, a large dining room with a long dining table, a cabinet with a porcelain collection, a chandelier, and a set of silver plateware and candle holders. The long semi-library, the billiard room, and the library are decorated in green, albeit different shades of green, with the true library having a forest green, and the billiard room and semi-library a lighter shade. The parlor room and the living room, as well as the entry foyer have red wall paper. Floral pattern decorations occasionally paint the high ceilings. The dining room is blue and white, like the porceilin in the cabinets, and every outer wall is lined with windows. The entry foyer has a large chandelier, and the two semi-circular staircases going up to a large landing. Underneath this staircase, towards the door going outside that sits between the parlor room and the semi-library, is a powder room, and a seperate, larger bathroom that includes a tub. There is also a closet with boots and umbrellas inside, and across from that, a door that opens into a basement.
Going up the staircase, there is a landing with red carpet, a suit of pony armor on the left, as well as paintings on the walls. It should be noted that most rooms have at least one painting on the walls, as this seems to decorate empty wall space when there is no cabinet or display case. Every single painting that is not a portrait is in the same artistic genre - a school of realism that was popular about 200 years ago. Most of the paintings show nature scenes, ruins, famous landmarks, or mundane scenes like a colt putting on shoes in an outdoors scene. These paintings mostly come from the same four or so artists, it seems. Upstairs, there are also several portraits of unicorns. These appear old and are accompanied by a pair of old photographs - more than a half century old - of mares. At the far end of the landing is a "flower room," with large windows, several potted plants, an old stove, a couple chairs, and a pair of small statues of mares. This room connects to what must be a work room on the left, which has a large, luxurious desk, a large window, a leather chair, more bookshelves, and decorations like zebrican shields, more halberds, and paintings on the wall that include symbols and abstract shapes. There is a table at the far end that is a small, marble square placed at an odd angle. This room connects to the staircase of the library, and to what seems to be a dressing room, that in turn connects to what seems to be the master bedroom. The Master bedroom has a large bed, a phonograph, a sofa, more paintings and cabinets, another statue, and a taxidermied... Chimera? It's not the full animal. This connects to a large bathroom and closet with a marble jaccuzi tub in the former (this must be a new addition as it does not fit with the general decorum) and a closet full of suits. There is also a door that connects to a staircase that goes up to a third floor.
All of these rooms take up the left/northern half of the second floor, but the other half includes one, two, three more bedrooms, on the other side, as well as two smaller bathrooms, and a small smoking room that connects to the flower room. This latter room is decorated with many mirrors.
The manor is not anywhere styled as a castle, and certainly was not actually intended to be a castle. There may be magical wards, but no mundane locks on the main floors. In fact, the staircases going to the third floor and the basement are the only doors that are locked.
The house has electric lighting and indoor plumbing. These must have been added during renovation, as the house's construction seems to have preceded these innovations.
Lament seems to be the only pony living in the manor itself, although unmade beds in a couple bedrooms suggest there may have been others.
The manor is of course only one of several buildings on the property.