This is an amusing, some-what genre-mocking little Country House murder-mystery - but still intriguing enough to keep the pages turning. I managed to partially guess what was going on but not enough of it to spoil the story; there's nothing worse than figuring out the mystery ahead of its revelation by the amateur sleuth.
It's interesting to note that this type of story appeared to be something of a cliche to its author all the way back in 1922, hence the slightly mocking tone. How much time was there between the inception of the detective story (by Poe) and it becoming somewhat old hat? Less than 80 years apparently.