Notes
Sentinel of Eternity, a short story by Arthur C. Clarke, can be found on pages 41-47.

The text includes an illustration by an uncredited artist on page 41.

This short story was used as a starting point for 2001: A Space Odyssey, where it was modified and fused with other ideas including another short story, Encounter in the Dawn.

Also published as The Sentinel.

Introductory Blurb
Before there were men on Earth, that signal-sending pyramid had stood alone on a lifeless moon. What would happen now that its alarm was silenced.

Alternative Title
The Sentinel – published in:
New Worlds Science Fiction, edited by John Carnell, Vol.8, No.22, April 1954, Nova Publications, London, Paperback/Magazine. Cover illustration by J. Kinnear.