| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| The Correspondence of Lord Acton and Richard Simpson Set: The Correspondence of Lord Acton Richard Simpson 3 Volume Paperback Set | 978-0-521-73813-2 | 2008 | Josef Altholz · James Holland |
| The Correspondence of Lord Acton and Richard Simpson: Volume 1 | 978-0-511-56100-9 | 2010 | Josef L. Altholz |
| The Correspondence of Lord Acton and Richard Simpson: Volume 1: v. 1 | 978-0-521-07819-1 | 1971 | " |
| The Correspondence of Lord Acton and Richard Simpson: Volume 2 | 978-0-511-56101-6 | 2010 | Josef L. Altholz · James C. Holland |
| The Correspondence of Lord Acton and Richard Simpson: Volume 2: v. 2 | 978-0-521-08688-2 | 1973 | Josef L. Altholz · James C. Holland |
| The Correspondence of Lord Acton and Richard Simpson: Volume 3 | 978-0-511-56102-3 | 2011 | Josef L. Altholz · James C. Holland |
| The Correspondence of Lord Acton and Richard Simpson: Volume 3: v. 3 | 978-0-521-20552-8 | 1975 | Josef L. Altholz · James C. Holland |