They Watched by Night is a 1941 detective novel by John Rhode, the pen name of the British writer Cecil Street.Evans p.248Magill p.1417 It is the thirty fifth in his long-running series of novels featuring Lancelot Priestley, a Golden Age armchair detective.Reilly p.1257 It was published in the United States by Dodd Mead with the alternative title Signal for Death.Reilly p.1257
References
Bibliography Evans, Curtis. Masters of the "Humdrum" Mystery: Cecil John Charles Street, Freeman Wills Crofts, Alfred Walter Stewart and the British Detective Novel, 1920-1961. McFarland, 2014. Magill, Frank Northen . Critical Survey of Mystery and Detective Fiction: Authors, Volume 3. Salem Press, 1988. Reilly, John M. Twentieth Century Crime & Mystery Writers. Springer, 2015.