Silence Observed is a 1961 detective novel by the British writer Michael Innes.Reilly p.845Hubin p.214 It is the seventeenth entry in his series featuring Sir John Appleby, now an Assistant Commissioner at Scotland Yard.Scheper p.133-34 It received a positive review from Anthony Lejeune in the Times Literary Supplement.
References
Bibliography Hubin, Allen J. Crime Fiction, 1749-1980: A Comprehensive Bibliography. Garland Publishing, 1984. Reilly, John M. Twentieth Century Crime & Mystery Writers. Springer, 2015. Scheper, George L. Michael Innes. Ungar, 1986.