Goodness, had forgotten I had bought this! Was very pleased to spot it in the bookshelf this weekend, waiting for me to remember. Right next to the phone (that had stopped working, again, dammit. We're phonedicapped here. Telephonically challenged. I can't understand it.).
This is her second Marsh novel, from 1935, although I have a late Fontana edition from -74 (with a fugtastic cover). Alleyn still has Bathgate the journalist as a sidekick, but Fox is becoming quite prominent (which is good, because I like Fox), and is referred to as Foxkin a lot, but not as Bre'er Fox. FYI.
Bathgate takes Alleyn to a play, in which a man is to be shot in the final scene. Naturally the stage gun is not loaded with blanks this time, but with real bullets, and everyone on stage has had motive and opportunity for switching the bullets.
Best thing with this book is the references to the drug trade. There really is nothing new under the sun. At the core of the plot is smuggling and selling of heroine and cocaine. Drugs are dope, and when you're high on them you're dopey. It all seems almost quaint in its 1930s setting.