1. Mr. Keen, Tracer of Lost Persons 1952 The Rented Cottage Murder Case

    Mr. Keen, Tracer of Lost Persons 1952 The Rented Cottage Murder Case

    35
  2. Mr. Keen, Tracer of Lost Persons 1950 The Case of the Woman Who Married a Murderer

    Mr. Keen, Tracer of Lost Persons 1950 The Case of the Woman Who Married a Murderer

    10
  3. Mr. Keen, Tracer of Lost Persons 1952 The Case of Murder and the Prize-Winning Bull

    Mr. Keen, Tracer of Lost Persons 1952 The Case of Murder and the Prize-Winning Bull

    41
    1
  4. Mr. Keen, Tracer of Lost Persons 1954 The Shrieking Prisoner Murder Case

    Mr. Keen, Tracer of Lost Persons 1954 The Shrieking Prisoner Murder Case

    33
  5. Mr. Keen, Tracer of Lost Persons 1955 The Case of Murder and the Revengeful Ghost (Final)

    Mr. Keen, Tracer of Lost Persons 1955 The Case of Murder and the Revengeful Ghost (Final)

    41
  6. Mr. Keen, Tracer of Lost Persons 1952 The Silver Candlestick Murder Case

    Mr. Keen, Tracer of Lost Persons 1952 The Silver Candlestick Murder Case

    31
  7. Mr. Keen, Tracer of Lost Persons 1952 The Mother's Plea Murder Case

    Mr. Keen, Tracer of Lost Persons 1952 The Mother's Plea Murder Case

    31
  8. Mr. Keen, Tracer of Lost Persons 1951 The Abandoned Well Murder Case

    Mr. Keen, Tracer of Lost Persons 1951 The Abandoned Well Murder Case

    16
  9. Mr. Keen, Tracer of Lost Persons 1950 The Telephone Book Murder Case

    Mr. Keen, Tracer of Lost Persons 1950 The Telephone Book Murder Case

    17
  10. Mr. Keen, Tracer of Lost Persons 1951 The Airport Murder Case

    Mr. Keen, Tracer of Lost Persons 1951 The Airport Murder Case

    19
  11. Mr. Keen, Tracer of Lost Persons 1950 The Quicksand Murder Case

    Mr. Keen, Tracer of Lost Persons 1950 The Quicksand Murder Case

    15
  12. Mr. Keen, Tracer of Lost Persons 1951 The Photograph Album Murder Case

    Mr. Keen, Tracer of Lost Persons 1951 The Photograph Album Murder Case

    37
  13. Mr. Keen, Tracer of Lost Persons 1952 The Gossip Column Murder Case

    Mr. Keen, Tracer of Lost Persons 1952 The Gossip Column Murder Case

    36
  14. Mr. Keen, Tracer of Lost Persons 1951 The Poisoned Sandwich Murder Case

    Mr. Keen, Tracer of Lost Persons 1951 The Poisoned Sandwich Murder Case

    37
  15. Mr. Keen, Tracer of Lost Persons 1951 The Strange Murder of Carrie Ellis

    Mr. Keen, Tracer of Lost Persons 1951 The Strange Murder of Carrie Ellis

    42
  16. Mr. Keen, Tracer of Lost Persons 1949 The Case of the Ruthless Murderers

    Mr. Keen, Tracer of Lost Persons 1949 The Case of the Ruthless Murderers

    42
  17. Mr. Keen, Tracer of Lost Persons 1949 The Case of the Man Who Invented Death

    Mr. Keen, Tracer of Lost Persons 1949 The Case of the Man Who Invented Death

    42
  18. Mr. Keen, Tracer of Lost Persons 1949 The Case of Murder with a Thousand Witnesses

    Mr. Keen, Tracer of Lost Persons 1949 The Case of Murder with a Thousand Witnesses

    37
  19. Mr. Keen, Tracer of Lost Persons 1949 The Case of Murder and the Star of Death

    Mr. Keen, Tracer of Lost Persons 1949 The Case of Murder and the Star of Death

    38
  20. Mr. Keen, Tracer of Lost Persons 1946-The Case of the Glamorous Widow

    Mr. Keen, Tracer of Lost Persons 1946-The Case of the Glamorous Widow

    33
  21. Mr. Keen, Tracer of Lost Persons 1945-The Case of the Absent Minded Professor

    Mr. Keen, Tracer of Lost Persons 1945-The Case of the Absent Minded Professor

    31
  22. Mr. Keen, Tracer of Lost Persons 1945-The Strange Case of Charley Lorimer

    Mr. Keen, Tracer of Lost Persons 1945-The Strange Case of Charley Lorimer

    36
  23. Mr. Keen, Tracer of Lost Persons 1949 The Yellow Talon Murder Case

    Mr. Keen, Tracer of Lost Persons 1949 The Yellow Talon Murder Case

    54
  24. Mr. Keen, Tracer of Lost Persons 1949 The Silver Dagger Murder Case

    Mr. Keen, Tracer of Lost Persons 1949 The Silver Dagger Murder Case

    47
  25. Mr. Keen, Tracer of Lost Persons 1949 The Forgotten Cave Murder Case

    Mr. Keen, Tracer of Lost Persons 1949 The Forgotten Cave Murder Case

    48