`This detective novel is much more than interesting. The numerous characters are well differentiated, and include one of the most feckless, exasperating and lifelike literary men that ever confused a trail.` Dorothy L. Sayers, Sunday Times, 1934 When Miss Pongleton is found murdered on the stairs of Belsize Park station, her fellow-boarders in the Frampton Hotel are not overwhelmed with grief at the death of a tiresome old woman. But they all have their theories about the identity of the murderer, and help to unravel the mystery of who killed the wealthy `Pongle`. Several of her fellow residents - even Tuppy the terrier - have a part to play in the events that lead to a dramatic arrest. This classic mystery novel is set in and around the Northern Line of the London Underground. It is now republished for the first time since the 1930s.