"This tower-house is rectangular without projections of any kind. The principal apartments are one upon another, five storeys in all. They consist of a barrel-vaulted basement with a timber floor dividing it into two storeys, a vaulted hall (not divided) and two unvaulted storeys above that. All this is contained by the four walls 9 feet thick. Above this level there is an unprecedented borrowing of space from them. Stairs and mural chambers are extraordinarily numerous. Void prevails over solid. The thick-wall construction becomes hollow-wall or cellular, and the solid weight of masonry in the haunches of the vaults is burrowed into for entre-sol floors. Even the flue of the great fireplace in the hall contains a little chamber with a window overlooking the hall, opening off a private suite in the thickness of the northwest corner of the tower. This was served only by a private wheel stair from the hall, going no further."

— Stewart Cruden. The Scottish Castle. p136.