| Year | 2021 |
| Date | 29-Jan |
| Volume | 226 |
| Issue | 4,657 |
| Page | 214 |
| Category | Stationary Engine |
| Part | 2 |
| Title | The Middleton Double 'Monitor' Type Engine |
| Author | Rodney Oldfield |
| Notes | Constructs another of Bob Middleton's small but interesting engines. Flywheel, the cylinders, cylinder inner cover, outer cylinder covers, piston rod, piston, valve rod gland, fastening cylinders onto the frame |