Placement
- contained in Arthur C. Clarke Audiobook Collectionomnibus
- contained in From the Ocean, from the Starsomnibus
- contained in More Than One Universe: The Collected Stories of Arthur C. Clarkecollection
- contained in Of Time and Starscollection
- contained in The Best from Fantasy and Science Fiction, Seventh Seriesanthology
- contained in The Best of Arthur C. Clarke: 1937-1971collection
- contained in The Other Side of the Skycollection