While attractive Anne Beddingfeld was seeking a position to eke out the £87 left her by her father. She saw an unknown man killed in a London tube station by falling on the third rail. A man in a brown suit, though he said he was a doctor, examined the body in an unprofessional way, pronounced the unknown man dead and hurried away. As he went he dropped a bit of paper which Anne picked up and this is what she read: "17.122 Kilmorden Castle." The police refused to regard the thing as unusual, but Anne thought otherwise. With the bit of paper as her clue and her £87 as her only capital, Anne followed a mysterious trail from London to South Africa, succeeded in righting an old wrong, and in the end found her own happiness.
"It is a real pity that 'The Man in the Brown Suit' should come to such an end, for this tale of a diamond robbery is in the main ingenious, well written and exciting." -Boston Transcript.
" 'The Man in the Brown Suit' is the best of its kind I have met for a long time; it is remarkable especially for brand new device for concealing the villain's identity to the very end, I defy the most practiced hand to discover him. -New Statesman.