| Year | 1968 |
| Date | 16-Feb |
| Volume | 134 |
| Issue | 3,339 |
| Page | 189 |
| Category | Armament |
| Part | 2 |
| Title | A Fort Gun |
| Author | "Little Eatonian" |
| Notes | Side frames of the carriage, machining procedure - frame sides, milling axle gaps in frame sides, front and rear axles, wheels, tie bars, quoin stand and quoin, a word of advice, conclusion |