| Clue | Source | Date |
|---|---|---|
| Wood engraving | ||
| Black-and-white photoengraving | The Washington Post Sunday | 23 Jan 2022 |
| Black-and-white engraving | The Washington Post | 11 Jan 2016 |
| Black-and-white engraving | ||
| Photoengraving in solid black and white | ||
| Engraving | ||
| Kind of printing plate | ||
| Kind of engraving | ||
| Style of photoengraving |