| Title | Invisible Thread |
| People | Thomas Betson |
| Year | late 1400's |
| Source | Notebook of Thomas Betson, a Middlesex monk. |
| Description | He suggested using a hair to make the a hollow egg move or appear suspended in space by hanging it from the ceiling. He also listed a trick using a coin, a hair, and wax to make the coin move. |
| Details | The Notebook was quoted in "Magic in the Middle Ages" by Richard Kieckhofer, Cambridge University Press, 1989. |
| Researched by | Stuart Joseph |
| Category | gimmick |
| Subcategory | coins, eggs, mental |