To the west of the dining room is the library, with oak door and window surrounds and a red brick fireplace with a denticulated mantel with a diamond motif. To the rear is the kitchen. A grand staircase ascends from the entry hall to the second story. It is paneled in oak and edged with bead-and-reel molding. Its first landing is lighted by a large triple window set in the curving wall of the west tower. In the upper panes of the window are stained glass panels which depict the Sanford coat-of-arms. Facing the second floor landing is a full-length fireplace of dark green glazed brick, rimmed with studded iron bands and with bead-and-reel and egg-and-dart moldings at the ceiling. In the chimney breast is a niche, also rimmed with studded iron bands, and the lining of the fireplace is cast iron in a pattern of interwoven bands. All of the doors on the second floor are paneled, and the entry to the hallway is arched. There is a second library with fireplace with oak surround and five bedrooms on the floor, including the large master bedroom in the curving north tower. The five servants' bedrooms on the third floor are unornamented. The outbuildings are located on a slight rise to the south of the castle. They include the one-story, four-room, hip-roofed caretaker's cottage; a hip-roofed carriage house; a hip-roofed water tower; a woodshed, pump-house, and barn, all clad in wood shingles. Today the castle lies in ruin. The wooden interior structure, including the multiple floors, have collapsed, leaving the castle in complete disrepair. It has been fenced off to the public. Hearthstone Castle is significant as late nineteenth-century country estate centered on an architect's interpretation of a medieval castle. Hearthstone Castle and its related Shingle-style outbuildings, which include a caretaker's cottage, carriage house, water tower, pump-house and sheds, were constructed as a summer estate between 1895 and 1899 for Elias Starr Sanford and his wife, Emma. Sanford, a Danbury native, achieved success and a national reputation as a society portrait photographer in New York City as a partner in the firm of Davis & Sanford. Following the dissolution of the firm in the early twentieth century, Sanford conducted studios in New Haven, Atlantic City, Philadelphia, Greenwich and Texas.