Fergus O'Breen
1 The Case of the Crumpled Knave (1939)
2 The Case of the Baker Street Irregulars (1940)
aka Blood on Baker Street
3 The Case of the Solid Key (1941)
4 The Case of the Seven Sneezes (1942)
2 The Case of the Baker Street Irregulars (1940)
aka Blood on Baker Street
3 The Case of the Solid Key (1941)
4 The Case of the Seven Sneezes (1942)
