(Sir) Mortimer Wheeler and Tessa Wheeler prepared the first official guide to the Roman amphitheatre outside the legionary fortress at Caerleon (Isca Silurum) in 1935. The couple had excavated on the site in 1926–27. This guide reappeared as the Ministry of Works paper guide in 1950. It contains the sections:
- Caerleon in Legend and History
- The Amphitheatre
A plan appears on one of the middle pages. There is a note about the legionary barrack-blocks in Prysg Field (also in State Guardianship).
This simple guide was expanded into the ‘blue’ guide with a contributions by Dr V.E. Nash Williams. This is divided into the following sections:
- Caerleon in legend and history
- The amphitheatre
- The Prysg Field barrack-buildings
- Caerllion [short summary in Welsh]
Two fold-out plans appear inside the back cover. The first two sections are essentially the same text as the 1950 guide by Wheeler; Williams contributed the discussion of the barrack-buildings.
The DOE guide has a different bilingual title inside:
Caerleon Roman Amphitheatre and Barrack Buildings
Theatre Gron Rufeinig Caerllion a Llety’r Milwyr
The Welsh Office / Y Swyddfa Gymreig produced the Official Handbook / Llawlyfr Swyddogol (blue guide) in 1980. Welsh was used on the cover, and inside the guide uses the bilingual titles that were used in the original blue guide.
The main difference is that there is an extended guide in Welsh with sections mirroring the English section: Hanes; Theatr Gron; Disgrifiad.
Jeremy K. Knight prepared the new Cadw guide (1988). There was a move away from it being a guide to the amphitheatre to the legionary fortress. The guide was organised in the following sections:
- In search of Isca
- The legion and its fortress
- The foundation of Isca
- The layout of the fortress
- The Second Legion and the occupation of Caerleon
This was followed by a tour guide, starting with the fortress baths, followed by the amphitheatre, defences and barracks.
A fold-out plan is printed inside the rear card cover.
There is a single page summary in Welsh (Hanes; Disgrifaid).
Knight prepared the 3rd edition (2003) in the new large format of Cadw guides. A fold-out bird’s eye view was printed inside the front card cover, and a plan inside the back cover. It is divided into two main sections: a history of Roman Isca; a tour of Roman Isca. It contained a feature on ‘Outside the walls: the civilian settlements’.