Glass Floor, The

Published in Startling Mystery Stories. Stephen King's first professional sale, for which he received $35.

Charles Wharton wishes to see the place where his sister Janine died. Anthony Reynard, her husband, refuses to allow the room, which has since been sealed, to be re-opened.

Eventually Charles enters the room, only to find it a has a glass floor and ceiling. He soon loses his balance and dies. His body is removed from the room, and the doorway replastered.