The Cornish Mystery

Hastings and Poirot are playing the board game Monopoly when they are interrupted by Lord Pearson, the elegant Chairman of the London and Shanghai Bank. The banker asks them to investigate the disappearance of a Mr Ling - a highly-valued customer who, before he went missing, had arranged to sell Lord Pearson a map showing where to find a long-lost silver mine. Then Ling is found murdered, a young stockbroker is suspected, and Poirot has to untangle a devilishly mixed-up mystery.