Gallows of Gold (Horwitz Publications Inc. Pty. Ltd., 1960?) has been grouped as part of a series of related series of one-shots.

Some 'On the Spot' books have branding on the cover. Others only list it on the title page.

Series

1. Casino Minx Calvert Publishing Co. Pty. Ltd. ([1960?])

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2. The Tearful Tigress Calvert Publishing Co. Pty. Ltd. ([1960?])

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3. Double or Nothing Calvert Publishing Co. Pty. Ltd. ([1960?])

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4. Gallows of Gold Horwitz Publications Inc. Pty. Ltd. ([1960?])

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5. Lay Low My Lovely Calvert Publishing Co. Pty. Ltd. ([July 1950?])

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6. Fate Chose This Number Calvert Publishing Co. Pty. Ltd. ([1960?])

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7. Don't Bother to Knock Calvert Publishing Co. Pty. Ltd. ([1960?])

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8. Flight into Fear Calvert Publishing Co. Pty. Ltd. ([1960?])

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9. Slay Belle Calvert Publishing Co. Pty. Ltd. ([1960?])

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10. Venus Had Claws Calvert Publishing Co. Pty. Ltd. ([1960?])

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11. A Wink from a Witch Calvert Publishing Co. Pty. Ltd. ([1960?])

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