A Sort of Traitors is a 1949 thriller novel by the British writer Nigel Balchin. The title is taken from Shakespeare's Richard II Act 4, scene 1 "Mine eyes are full of tears, I cannot see; And yet salt water blinds them not so much But they can see a sort of traitors here."
Plot A British biological research team had spent years developing new methods of controlling epidemics. HM Government minister refuses to let them publish their findings that could benefit mankind in case a foreign power uses it for biological warfare.
Film adaptation In 1960 it was made into a film Suspect directed by the Boulting Brothers and starring Tony Britton and Virginia Maskell.Goble p.22
References
Bibliography Goble, Alan. The Complete Index to Literary Sources in Film. Walter de Gruyter, 1999. James, Clive. At the Pillars of Hercules. Pan Macmillan, 2013.