Stephen Clearman, the King of Clubs — so called because of his innumerable club memberships — has just completed renovating his house. It’s a risky move because the house is cursed: anyone who modifies it in any way will die. Stephen thinks he’s outwitted the curse, though. He’s traveled extensively in Africa researching magic and building his collection of protective mud masks. He spends an hour a day wearing a mask and… I don’t know, reciting incantations or something, it’s left pretty vague. Standing to inherit, should he die, are his daughter Lulie, his sister Phoebe, and his wife Carlotta, called the Queen of Diamonds because of her love for the stones. Carlotta assists Stephen in his fight by scouring the attic for pages from his great-great-whatever-whatever ancestor’s diary relating to the curse. I guess it’s got a lot of sub-clauses — it’s left pretty vague, too.
And what would you know, Stephen does die during his alone time with his masks. The mode of death isn’t obvious and his room was locked from the inside. Lulie, meanwhile, has vanished without a trace. When the police detective fails, a private detective is called in and it isn’t Fleming Stone this time — it’s Tony Barron, who I think only appears in this one novel, but Carolyn Wells wrote a million of these things and I might be mistaken.
There’s the usual reveal at the end where the detective sums up the crime, but the book actually has a few reveals starting at about the half-way point. Granted, none of them were exactly stretches to solve. How the door was locked from the inside (or rather, how butler West made it seem as though it was) was very plain if for no other reason than the oddly detailed stage direction in the door opening scene that screamed something untoward was afoot. That Carlotta was the mastermind of the murder also took very, very little deductive skill. I’d had her picked out before the murder even occurred — she’d plainly been the author of the forged diary pages and there was no other reason for their existing. No, the real question was how the various sub-mysteries tied together, and a big part of that was whether West was really involved or just Carlotta’s patsy.