J. J. Connington 
Mystery At Lynden Sands [EPUB ebook] 

Mystery At Lynden Sands, first published in 1928, is the fourth book in author J. J. Connington’s series featuring chief-constable Sir Clinton Driffield. Set on the English seaside, Driffield encounters the return of a missing heir (who is possibly an impostor), an accidental bigamist, secret marriages and impersonations, embezzlement of trust funds, a kidnapping, and two murders. As is typical of Connington’s detectives, Sir Clinton is able to deduce impressive insights from physical clues. J. J. Connington is a pen-name of Alfred Walter Stewart (1880-1947).