Woo hoo. I love getting lost in a doorstopper, but it takes a skilled writer to squeeze the right emotions out in a shorter work. Roberts Rinehart got mad skills. And a truly modern feel. Hard to believe this was first published more than 100 years ago.
We get a quick and dirty set up: Miss Adams is a trained nurse who investgates for the cops from the inside. She packs her gun and a suitcase and is on the scene in a big family home trying to find out what the family is hiding, what happened to the nanny, and what freaked out the last nurse so badly.
I am delighted to say I never predicted that solution. Happily there are plenty of stories available in the public domain. Collect them all.