This is a 1928 book by British chemist and author Alfred Walter Stewart, writing using the pseudonym JJ Connington. This is the third book in his Chief Constable Sir Clinton Driffield series. The setting is in late 1920s in the fictional small seaside town of Lyndon Sands. Sir Clinton is a young but brilliant Chief Constable who was vacationing in Lyndon Sands Hotel with his good friend Wendover who he called Squire (Wendover is a Justice of the Peace and is Sir Clinton’s Watson). Like many stereotypes Watson of the period (such as Sherlock Holmes’ Dr Watson and Hercule Poirot’s Captain Hastings), Wendover has a protective instinct towards beautiful women and would never believe a beautiful woman could commit any criminal act. The book is a police procedural book with a complex and twisty plot and comes with a few maps which helps the readers understand the lay of the land. Overall, however, I feel like it just read like an average Golden Age country house mystery. A book that is only 3.5 Star on a 5 Star scale.
In the book, Sir Clinton uses a lot of interesting scientific detection method. In a way, he is like R. Austin Freeman’s Dr. Thorndyke but probably less technical. The forensic sciences used in this book included very extensive footprint analysis, preservation of footprints using wax cast, toolmark analysis, bullet casing trajectory analysis, tire mark analysis, etc. It also uses one of the common plots of the Golden Age: whether a returning heir is the real heir or an imposter; other themes include accidental bigamy and embezzlement. The one thing I think really useful is that Connington has Sir Clinton provides a recap of the whole case in the end to tie up loose ends and put all the clues in perspective.
Spoiler Alert. The story starts with the death of Peter Hay, the caretaker of a local estate called Foxhills which are held by the Fordingbridge family. Like many Golden Age mysteries, when old Fordingbridge died, he left multiple adult offsprings and a very complex will. Under the will, the Foxhills estate (and the family money) will go first to the eldest son John on a life-tenancy. John has died. So, it goes to next eldest brother Rufus (who has also died). Then it goes to Rufus’ son Derek. Derek, however, has been missing in action in World War One and nobody is sure if he is dead or alive. Before Derek went away, however, he gave a power attorney to his uncle Paul to manage his affairs. If Derek were to die, then the family estate goes to sister Cressida. If Cressida were to die, then the youngest brother Paul were to get everything. In recent time, since John and Rufus have both died and Derek is missing, Paul has been managing the family estate for Derek. It also happens that Paul has been embezzling from the estate.
When caretake Peter Hay died, the doctor was suspicious and called in the local police, Inspector Armadale. Armadale quickly realized the case may be a complex one and since the famous Chief Constable Sir Clinton is vacationing in town, he requested his help. They soon concluded Hay was murdered by a chemical called amyl nitrite, a gas asthmatics inhale to relieve their attacks. While it is harmless to most people, it is fatal if inhaled by someone with Hay’s heart condition (he had a stroke last year). His murderers knew of his medical condition and deliberately used that to try to make it look like is death is from natural cause (a heart attack). Later, Sir Clinton also discovered that someone has broken into the Foxhills estate and stolen the diaries Derek has kept before he left to fight in the war. Later, a man called Nick Staveley was found murdered on the beach, on a large rock called Neptune’s Seat. By following the footprints made around the crime scene and witnesses’ testimony, Sir Clinton were able work though the red herrings and ultimately solved the case.
It turns out what happened was a complex crime scheme masterminded by a man called Cargill. A few years ago, he ran into Nick Staveley, who was a very bad person who was married to Cressida Fordingbridge. Staveley ran into trouble with the army but was given a choice to fight in the war or go to jail. In one battle, where he served with Derek Fordingbridge, he saw Derek being killed. Staveley then switched his identification disc with Derek so people thought it was Staveley who died. Staveley was then captured by the enemy but escaped (as Derek). He then came back to England with a new identity and ran into Cargill. The two came up with the plan whereby Cargill will use his brother (whose physical build is similar to the dead Derek and whose face has been badly disfigured in the war) to be an imposter of Derek and to claim the Fordingbridge estate. Since the real Derek has been close to the caretaker Peter Hay and Hay can easily identify the imposter, one of the first action of the gang was to murder Hay. What they did next was to break into the Foxhills estate to steal Derek’s diaries. With that, they used a card index cabinet and built a chronological database on everything they know about Derek (through information from Derek’s diaries, the ex-valet’s knowledge, and Staveley’s knowledge) so the imposter can educate himself to pass as Derek. In the meantime, however, Staveley was doing a sideshow of his own by trying to blackmail Cressida. Cressida met with Staveley in secret one night at Neptune’s Seat. The two argued. Cressida shot Staveley but missed. Staveley nevertheless had a fall and fainted. Cressida mistakenly thought she has killed Staveley and ran. Later after Staveley woke up, his accomplices arrived and shot him dead. They did it because they could then get a bigger part of the spoils, but also they want to frame his death on Cressida to take Cressida out as a potential challenger to Derek imposter’s claim to the estate. Later, the gang also murdered Paul as he gets suspicious about the imposter and hid Paul’s body in a nearby quicksand pit. After Paul has been eliminated, the only person left to challenge the imposter is Cressida. So, they tried to force Cressida to marry the fake Derek and then to murder her. Sir Clinton and the police arrived in time to save Cressida and to arrest the gang.