Tolquhon Castle: plan of first floor and forecourt Tolquhon Castle, Aberdeenshire, 'surveyed by D[avid] McG[ibbon] and T[homas] Ross, 1881, revised by W[illiam] D[ouglas] Simpson, 1924, revised again after excavations 1936'. Plan of first floor and forecourt. Scale in feet Late 19th Century - Early 20th Century