- Lecturer ancient history University College, Cardiff, England, 1962-1972, senior lecturer England, 1972-1979, reader England, 1979-1985. Professor ancient history University Wales College of Cardiff, since 1985, deputy principal, 1987-1990.
- Computer and Information Security Handbook, Second Edition
- The second edition of this comprehensive handbook of computer and information security provides the most complete view of computer security and privacy available.
- A Roman Villa (Inside Story)
- Illustrations and text describe life in the villa of a wealthy family situated in the countryside outside Rome during the first century A.
- The Count Of The Saxon Shore Or The Villa In Vectis: A Tale Of The Departure Of The Roman's From Britain (1887)
- This scarce antiquarian book is a facsimile reprint of the original.
- The Count of the Saxon Shore: Or, the Villa in Vectis, a Tale of the Departure of the Romans From Britain,
- This is an EXACT reproduction of a book published before 1923.
1962 - 1972
1979 - 1985
1987 - 1990