1. Mr. Keen, Tracer of Lost Persons 1950 The Case of Murder and the Jewel Thief

    Mr. Keen, Tracer of Lost Persons 1950 The Case of Murder and the Jewel Thief

    65
  2. Mr. Keen, Tracer of Lost Persons 1944-The Case of Mr. Trevor's Secret

    Mr. Keen, Tracer of Lost Persons 1944-The Case of Mr. Trevor's Secret

    37
  3. Mr. Keen, Tracer of Lost Persons 1944-The Case of Murder in the Air

    Mr. Keen, Tracer of Lost Persons 1944-The Case of Murder in the Air

    2
    0
    39
  4. Mr. Keen, Tracer of Lost Persons 1944-The Nightmare Murder Case

    Mr. Keen, Tracer of Lost Persons 1944-The Nightmare Murder Case

    23
  5. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Missing Witness

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Missing Witness

    49
  6. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Leaping Dog

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Leaping Dog

    37
  7. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Girl Who Sang Too Well

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Girl Who Sang Too Well

    2
    0
    42
  8. Mr. Keen, Tracer of Lost Persons 1950 The King Cobra Murder Case

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

    45
    1
  9. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Boy Who Used Big Words

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Boy Who Used Big Words

    2
    0
    43
  10. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Woman in Blue

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Woman in Blue

    34
  11. Mr. Keen, Tracer of Lost Persons 1950 The Broken Window Murder Case

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

    41
  12. Mr. Keen, Tracer of Lost Persons 1944-The Case of the Girl Who Flirted

    Mr. Keen, Tracer of Lost Persons 1944-The Case of the Girl Who Flirted

    51
  13. 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

    54
  14. Mr. Keen, Tracer of Lost Persons 1950 The Country Club Murder Case

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

    16
  15. 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

    18
  16. 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

    19
  17. Mr. Keen, Tracer of Lost Persons 1951 The Case of Murder and the Strange Woman

    Mr. Keen, Tracer of Lost Persons 1951 The Case of Murder and the Strange Woman

    27
  18. Mr. Keen, Tracer of Lost Persons 1951 The Abandoned Well Murder Case

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

    24
  19. Mr. Keen, Tracer of Lost Persons 1950 The Telephone Book Murder Case

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

    24
  20. Mr. Keen, Tracer of Lost Persons 1951 The Airport Murder Case

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

    25
  21. 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

    31
  22. Mr. Keen, Tracer of Lost Persons 1950 The Quicksand Murder Case

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

    22
  23. Mr. Keen, Tracer of Lost Persons 1950 The Innocent Flirtation Murder Case

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

    44