Placement
- contained in Across the Sea of Starsomnibus
- contained in Across the Sea of Starscollection
- contained in Arthur C. Clarke Audiobook Collectionomnibus
- contained in History Lessoncollection
- contained in Of Time and Starscollection
- contained in Reach for Tomorrowcollection
- contained in The Collected Stories of Arthur C. Clarkecollection
- contained in The Collected Stories: Volume Onecollection
- contained in The Golden Years of Science Fiction: Fifth Seriesanthology
- contained in The Great Science Fiction Stories Volume 9, 1947anthology
- contained in Worlds of Tomorrowanthology