| Year | 2019 |
| Date | 08-Nov |
| Volume | 223 |
| Issue | 4,625 |
| Page | 709 |
| Category | Locomotive |
| Part | 1 |
| Title | Walchaerts (Walschaerts?) Valve Gear for Sweet Pea |
| Author | Frank Birchall |
| Notes | Explains how he upgraded the Hackworth valve gear on his Metre Maid to Walschaerts. Crosshead, expansion link support, the expansion link |