The Official Guide to Old Sarum was issued by the Office of Works (Department of Ancient Monuments and Historic Buildings) in 1922 with 18 pages. The 1927 version has been digitised. (Price 6 d). The guide adopted the format of an introductory history, followed by a description of the key elements including the castle and the foundations of the first cathedral. The guide include foldout plans. Notice the advertisement for photographic film on the back cover.