The Case of Lady Camber (play)

The Case of Lady Camber is a play by the British writer Horace Annesley Vachell, which was first performed in 1915. The play was a success in the West End, enjoying a lengthy run at the Savoy Theatre. It was not as well received in New York when it opened at the Lyceum Theatre in 1917.

When Lady Camber, an ex-music hall star, dies in mysterious circumstances, suspicion falls on her young nurse Esther Yorke who is suspected of murdering her so she can marry Lord Camber.

The play has been turned into films on three occasions:

...
Wikipedia