This Golden Age of Detection novel is set during Christmas week at the Noah's Ark, a former coaching inn currently chockablock with stranded travellers after a blizzard makes travel on overwhelmed rural roads impossible.
The large number of unexpected arrivals at Mr Girling's hostelry present a mixture of social and professional classes. Angus Stuart is independently wealthy due to the sales of his second novel, while Felix Melnotte is a professional dancer sensitive about his working class roots. Genial commercial traveller Captain Soames is a chess enthusiast, delighted at the prospect of games after well-known player and, as it turns out, amateur sleuth Dr Luke Constantine seeks shelter at the Noah's Ark while on his way to a tournament.
Also under the ancient roof we find Trevor -- readers never learn his surname -- a young, shy, and shabby chartered accountant's clerk, and Lord Romsey and his children Geoffrey. Angela. and Victoria. as well as wealthy widow Mrs van Dolen and her secretary Miss Hamilton. Mrs van Dolen is famous for her emerald girdle which in this instance means an item of dress known as a stomacher.
There's also Major Carew, a cad who drinks and attempts to force his attentions on young women, twittery elderly sisters Amy and Connie Adderley, and rich and attractive Mrs Orkney Cloude, something of a mystery though it is evident she knows at least one other guest at the inn and is not happy about it.
Right from the start the mystery rattles along at full tilt after Stuart is woken up the first night by the younger Miss Adderley, who is terrified after seeing a man in a mask lurking in the passage. They set off to investigate and suddenly the passage light is turned off. Subsequent incidents include rooms ransacked by unknown hands, an accidental fire revealing a secret, romances blooming, and the return of the masked man, who apparently possesses the ability to melt into thin air. The architecture of the ancient inn, a rambling structure containing more staircases, dark corners, landings, and floors than 2 legal, plays an important part in a plot involving hidden identities, robbery, and murder.
With much toing and froing inside and around the inn, The Crime At The Noah's Ark features a revolving cast of serial suspects and watchful alliances seasoned with a fair bit of excellent misdrection until its startling and somewhat complicated but fairly clued conclusion. Pencil and paper will aid readers to keep track of the large cast of characters and drawing a map of the establishment would be particularly helpful in keeping track of where characters are at various times, given a number of them are active during the night hours. For those who enjoy mayhem under the mistletoe, I should mention Christmas Day itself plays a small part in the narration but even so I award this novel an A.


