A train hurtles through a danger signal on a dark November night. The fireman is killed, and an innocent driver faces disgrace and prison. The railway company's men have searched every inch of the line and found nothing. Blind detective Max Carrados cannot see the signal, so he listens, measures, and asks the one question nobody else thought to ask.
His trail leads from a signal box to a quiet lodging house facing the line, and to one small object left behind by a vanished lodger: a wooden ruler, exactly four and seven-eighths inches long.
The Knight's Cross Signal Problem is a full-cast audio drama adapted from the classic Max Carrados detective stories by Ernest Bramah. It is a classic British mystery of railway intrigue, false signals, and a solution you can hear coming together, clue by clue.
Oct 9 202634 mins