1. Mr. Keen, Tracer of Lost Persons 1950 The Country Club Murder Case

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

    15
  2. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Frightened Child

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Frightened Child

    53
  3. Mr. Keen, Tracer of Lost Persons 1949 The Case of Murder and the Bloodstained Necklace

    Mr. Keen, Tracer of Lost Persons 1949 The Case of Murder and the Bloodstained Necklace

    40
  4. Mr. Keen, Tracer of Lost Persons 1949 The Forgotten Cave Murder Case

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

    53
  5. Mr. Keen, Tracer of Lost Persons 1950 The Bride and Groom Murder Case

    Mr. Keen, Tracer of Lost Persons 1950 The Bride and Groom Murder Case

    45
  6. Mr. Keen, Tracer of Lost Persons 1950 The Case of the Melody of Murder

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

    38
  7. Mr. Keen, Tracer of Lost Persons 1950 The Case of Murder and the Missing Car

    Mr. Keen, Tracer of Lost Persons 1950 The Case of Murder and the Missing Car

    45
  8. Mr. Keen, Tracer of Lost Persons 1950 The Case of the Two-Faced Murderer

    Mr. Keen, Tracer of Lost Persons 1950 The Case of the Two-Faced Murderer

    17
  9. Mr. Keen, Tracer of Lost Persons 1951 The Case of Murder at a Mile a Minute

    Mr. Keen, Tracer of Lost Persons 1951 The Case of Murder at a Mile a Minute

    19
  10. Mr. Keen, Tracer of Lost Persons 1950 The Telephone Book Murder Case

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

    23
  11. Mr. Keen, Tracer of Lost Persons 1951 The Airport Murder Case

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

    24
  12. Mr. Keen, Tracer of Lost Persons 1950 The Skull and Crossbones Murder Case

    Mr. Keen, Tracer of Lost Persons 1950 The Skull and Crossbones Murder Case

    30
  13. Mr. Keen, Tracer of Lost Persons 1950 The Quicksand Murder Case

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

    21
  14. Mr. Keen, Tracer of Lost Persons 1950 The Eccentric Millionaire Murder Case

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

    30
  15. Mr. Keen, Tracer of Lost Persons 1954 The Shrieking Prisoner Murder Case

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

    39
  16. Mr. Keen, Tracer of Lost Persons 1952 The Silver Candlestick Murder Case

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

    36
  17. 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

    37
  18. Mr. Keen, Tracer of Lost Persons 1951 The Poisoned Sandwich Murder Case

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

    43
  19. Mr. Keen, Tracer of Lost Persons 1949 The Silver Dagger Murder Case

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

    49
  20. The Case of the Missing Witness - Mr. Keene Tracer of Lost Persons

    The Case of the Missing Witness - Mr. Keene Tracer of Lost Persons

    31
    2
    33
    2