| A | B |
| tripod | A three-legged support or stand |
| capping | embedding electronic controls into a young person's head |
| vagrants | Those whose capping was unsuccessful |
| Jack | Will's favorite cousin |
| Henry | Will's least favorite cousin |
| tentacle | A long, slender, flexible growth used to touch, hold or move |
| hemisphere | Half of a sphere or globe |
| Ozymandias | Name of the "Vagrant" who approached Will |
| Wherton | Will's home village |
| Fourteen | Age for capping |
| Ankle | What Will injured in the dark |
| Sheep | What Will and Henry were running from |
| Watch | What Will took from his father's desk |
| Fight | What Will and Henry did whenever they met |
| Stealing | How Henry got food for himself and Will |