| Canning, Wellington and the Catholic Question, 1827-1829 | Machin, George Ian Thom | Article in Journal | | 1984 |
| The Catholic question and the monarchy, 1827–1829 | Machin, George Ian Thom | Article in Journal | | 1997 |
| The Catholic question in English politics, 1820 to 1830 | Machin, George Ian Thom | Monograph or Collective Volume | | 1964 |
| The duke of Wellington and Catholic emancipation | Machin, George Ian Thom | Article in Journal | | 1963 |
| The Maynooth grant, the dissenters and disestablishment, 1845-7 | Machin, George Ian Thom | Article in Journal | | 1967 |