Locked Doors is a long short story featuring nurse/investigator Miss Hilda Adams. She is often hired by the detective Mr. Patton to venture into situations that require a qualified nurse and a police spy.
The previous nurse in the house in Beauregard Square fled the job in terror and reported her experiences to the police. Mr. And Mrs. Reed want a nurse to look after their two little boys, even though there’s no illness in the house. All the servants have been dismissed, the Reeds live on take-out, and every door in the house is kept locked.
Miss Adams thinks she has nerves of steel. She does a lot of snooping around, mostly at night in the dark, and is surprised to find herself terrified. The plot includes a dead dog, dead goldfish, and a gray ghost. It’s a tantalizing mystery, lightly spiced with odd happenings and terror.
This looks like a digital printing, but it’s readable enough. No helpful introduction though. Locked Doors appeared in 1914, years before the author’s full-length novels featuring Nurse Adams as sleuth.