The Tragedy of X

"Well," said Inspector Thumm suddenly, "plain or fancy, it's a puzzler, and Mr. Bruno thought you'd be interested."

Inspector Thumm of the New York Police and Walter Bruno, the district attorney, call up on Drury Lane, retired Shakespearean actor, for help in a particularly puzzling murder case. Lane had been a help on a previous case. 

Harvey Longstreet, of the brokerage firm De Witt and Longstreet, was poisoned on the streetcar. He was a travelling with his business partner and other associates, but Longstreet wasn't very popular, and any of them would cheerfully have seen him dead. But how was it done? It was raining and the windows were closed; the streetcar was full after the Longstreet party got on and they didn't make any stops. The poison was fast-acting and everyone who could have done it was there.

The conductor of that street car sends a letter to Thumm saying he had information; his body is found bashed on the head and thrown from a ferry boat. And Longstreet's partner De Witt is murdered on a suburban train. The Commuter Murders! 

After Lane has heard the facts of the first murder, he says he knows who did it, but can't prove it. I read this twenty-five years ago, and I remembered the nature of the clue that Lane sees (though he doesn't disclose it until the end) but had still forgotten who the muderer was. But it is one of the best Queen mysteries, and shows up on best overall mystery lists as well. After reading Drury Lane's Last Case recently, I thought it was time to reread this one. Highly recommended!

Vintage Mystery Scavenger Hunt

Golden Age (1933). Train.