prior to the building's closure, and during the restoration, extensive historical and archaeological research was completed. as the archaeological investigations were underway in the building, it was found that much of the original plaster and woodwork remained, along with original floors and windows. the layout of the building was discovered by looking at wear patterns left in the original wooden floor. ink smudges were also discovered on the walls of the third floor, and are believed to date to the period when the building was occupied by grandin.