The LOCKED ROOM MYSTERY is a sub-genre of detective fiction
Typically, a "locked room" in this narrow meaning of the phrase is a room in which a murder is committed. There are a limited number of suspects, some of them possibly even with a watertight alibi.
The COZY MYSTERY is a sub-genre of detective fiction
A murder is committed amongst a small group of people who would normally seem unlikely people to be involved in a crime.
Molly and Giles Ralston , who are celebrating their first wedding anniversary, open a guest house just after the war and are hosts to a strange collection of characters. Among the guests who arrive during a blinding snow storm are …
Christopher Wren , a young architect who gets on Giles's nerves while flirting with Molly.
Mrs. Boyle is a sour ex workhouse matron who has more than a touch of cruelty about her.
Major Metcalf is the strong silent type and it’s his silence that makes him mysterious.
Miss Casewell is the slightly masculine type who has a lot of fun at Mrs. Boyle’s expense.
Mr. Paravicini , whose car broke down in the storm was not expected, and can thoroughly explain his mysterious appearance.
Sgt. Trotter is the last to arrive and is there to investigate a murder that took place earlier in London.
Literally weighing a ton, fueled by coke (a fuel used in a blast furnace) superbly insulated and extremely efficient, they were ideal for the larger kitchen, especially in farmhouses, in which lots of cooking jobs had to be carried out throughout the day.
To stoke the aga means to feed fuel to and tend the fire.
He was a 17th century English designer, astronomer, geometer, and the greatest English architect of his time. Wren designed 53 London churches, including St Paul's Cathedral, as well as many secular buildings of note. He was knighted in 1673.