| Year | 2018 |
| Date | 14-Sep |
| Volume | 221 |
| Issue | 4,595 |
| Page | 442 |
| Category | Locomotive |
| Part | 19 |
| Title | Technologie sans Frontieres |
| Author | Ron Fitzgerald |
| Notes | Looks at English and French locomotive design in the second half of the nineteenth century. Paris-Orleans Railway Pacific No. 4502, section of P.O. Series 4501, Maffei compound, reference |