Craigmillar Castle, to the south-east of Edinburgh, was placed in State Guardianship in 1946. W. Douglas Simpson prepared the official guidebook in 1954. At the heart of the castle is the tower house, constructed after 1374 by Sir Simon Preston of Gorton. Queen Mary used the castle as her residence after the murder of Rizzio in 1566.
The guidebook is divided into description and (a short) history. A plan of the castle, and detail of the floors is provided in the centre pages.