| HUYGENS | Christiaan who invented the pendulum clock |
| HOROLOGIUM | Faint southern constellation representing a pendulum clock (10) |
| DEADBEAT | Pendulum clock component that’s exactly round |
| BARNARD | Christiaan ___, the South African surgeon who performed the world's first successful human heart transplant (7) |
| EDGARALLANPOE | American poet and short story writer whose tales included The Fall Of The House Of Usher and The Pit And The Pendulum (5,5,3) |
| FOUCAULT | Leon ___, French physicist who demonstrated the rotation of the earth on its axis by means of the pendulum named after him |
| STANDER | Christiaan Johan are the first names of which sportsman? (7) |
| POE | Surname of the author of The Pit and the Pendulum, etc. (3) |
| RATS | Animals that help free the narrator in "The Pit and the Pendulum" |
| THEPIT | ___ And The Pendulum, short story by Edgar Allan Poe about the torture of a prisoner of the Spanish Inquisition (3,3) |
| EAP | 'The Pit and the Pendulum' monogram |
| PIT | The ___ and the Pendulum (Poe story) |
| POETASTER | Rhymester's introduction to The Pit and the Pendulum say |
| FRO | One of the ways the pendulum swings |
| DUNGEON | "The Pit and the Pendulum" setting |
| EAPOE | "The Pit and the Pendulum" author, in brief |
| RAT | One of several rodents in "The Pit and the Pendulum" |
| LANTERN | Case protecting a flame or light bulb; glass chamber at the top of a lighthouse or, linked with "magic" for a device whose invention is credited to Christiaan Huygens (7) |
| SYRTISMAJOR | Dark region of Mars observed by Christiaan Huygens in 1659 as the first documented surface feature of another planet (6,5) |
| VITAMIN | Any of various organic compounds, for the discovery of which Frederick Gowland Hopkins and Christiaan Eijkman were awarded a Nobel Prize in 1929 (7) |
