pale northern gothic dormitorio with Italianate doorarium.

I would say it likely started out life as a federal or Adam style inspired home, which was renovated near the end of the 19th century into something along the lines of colonial revival. A home that old has likely been changed a lot in the last 170 odd years, so narrowing it down would be hard without more pics and/or actually being on site.  It would be easiest to say that at present it represents an eclectic vernacular style; drawing from the history of the area and a handful of styles.