Here are a selection of covers from the 50s and 60s. While there are no smoking guns (a visual device favourite), there are the dames, the guys with hats, and some severe looking faces.
Mark Corrigan, I Like Danger.
London: Werner Laurie, 1954. Private Collection.
William McGivern, Rogue Cop.
London: Collins, 1957. Private Collection.
H. Seymour, The Bristol Affair.
London: John Gifford, 1960. Private
Collection.
William Shand, Tempest Weaves a Shroud.
London: Herbert Jenkins,
1957. Private Collection.
Leonard Gribble, Speed Dermot: Junior Reporter.
London: Spring
Books, [n.d.] Private Collection.
Gavin Lyall, The Most Dangerous Game.
London: Hodder and Stoughton,
1964. Private Collection. Designer: Studio Stead.