Tritonia

My Lady Greensleeves is a science fiction novella by Frederik Pohl first published in 1957.

This guard smelled trouble and it could be counted on to come—for a nose for trouble was one of the many talents bred in the prison of the future!

Frederik George Pohl, Jr. (1919-2013) was an American science fiction writer and editor, with a career spanning more than seventy-five years. From about 1959 until 1969, Pohl edited Galaxy and its sister magazine If; the latter won three successive annual Hugo Awards as the year's best professional magazine. He won four Hugo and three Nebula Awards. 

The Science Fiction Writers of America named Pohl its 12th recipient of the Damon Knight Memorial Grand Master Award in 1993 and he was inducted by the Science Fiction and Fantasy Hall of Fame in 1998.