Placement
- Time Patrol — #4
- contained in Annals of the Time Patrolomnibus
- contained in Brain Wave / The Boat of a Million Years / The Guardians of Timeomnibus
- contained in Futures Pastanthology
- contained in Guardians of Timecollection
- contained in Stories from The Guardians of Timecollection
- contained in The Saturn Gamecollection
- contained in The Time Patrolcollection