| Year | 1962 |
| Date | 05-Jul |
| Volume | 127 |
| Issue | 3,182 |
| Page | 21 |
| Category | Armament |
| Part | |
| Title | Early Guns |
| Author | T.E.Swinton |
| Notes | Introduction of gunpowder, Mons Meg, vertical borer, the Gun-Founders of England by C.Floulkes (OUP), Diderot's Encyclopedie (Vol. V), explosion risks |