The Hidden Harbor Mystery   Formats:

1) Brown/Yellow/Orange Gretta
2) Brown/Wrap/Orange Gretta
3) Tweed/Wrap/Orange Gretta
4) Tweed/Wrap/Brown Multipic
5) Tweed/Wrap/White Multipic (thanks to Tony Carpentieri for this one)
6) PC/White Multipic

Illustrators:

1) J. Clemens (aka Clemmens) Gretta - 1935
2) Bill Gillies - 1950
3) Rudy Nappi - 1962

Authors:

1) Leslie McFarlane
2) James Buechler

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