The Case of Naomi Clynes: An Inspector Richardson Mystery

"The late Miss Clynes, sir? How dreadful. It must have been very sudden."
"It was."
Naomi Clynes was found dead, her head in the gas-oven. She left a suicide note, but Richardson, newly promoted to the rank of Inspector in the C.I.D., soon has cause to think this is a case of murder. With scarcely a clue beyond a postmark and a postage stamp, treasured by the deceased, he succeeds in bringing home the crime to a person whom no one would have suspected.
The Case of Naomi Clynes was originally ...